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$142.49 Too low to display list($199.99)
1. Texas Instruments TI-89 Titanium
$77.99 list()
3. Hewlett Packard 49G+ Graphing
$180.49 $179.88 list($199.99)
4. Texas Instruments Voyage 200 Calculator
$132.04 $113.95 list($129.99)
5. Texas Instruments TI-84-Plus Silver
$107.34 $97.99 list($109.99)
6. Texas Instruments TI-84-Plus Graphing
$125.95 list($190.00)
7. Texas Instruments TI-89 Advanced
$105.44 $80.00 list($150.00)
8. Texas Instruments TI86 Graphing
$381.51 list($265.00)
9. HP HP48GX RPN Expandable Graphic
10. Texas Instruments TI83 Graphing
$71.24 list($139.99)
11. Casio CFX-9850GB Plus Graphing
12. Texas Instruments TI-92 Plus Graphing
$99.74 $91.50 list($129.99)
13. HP 48GII Graphic Calculator (F2226A)
14. HP 48G Graphing Calculator
$142.49 list($179.95)
15. Casio ClassPad 300 Touch-Screen
16. Texas Instruments TI-85 Advanced
17. Texas Instruments TI-82 Graphing
$18.99 list($19.99)
18. Texas Instruments Graph-Link Serial
19. Texas Instruments TI-81 Graphing
$64.59 list($79.99)
20. Sharp EL-2630PIII Deluxe Heavy

1. Texas Instruments TI-89 Titanium Graphing Calculator
by Texas Instruments
list price: $199.99
our price: $142.49
(price subject to change: see help)
Asin: B0001EMLZ2
Catlog: CE
Manufacturer: Texas Instruments
Sales Rank: 383
Average Customer Review: 4.5 out of 5 stars
US | Canada | United Kingdom | Germany | France | Japan

Product Description

This powerful Texas Instruments advanced graphing calculator does all the math functions you'd want but it also lets you create animations and do 3D graphing and rotation. And the TI-89 is permitted for use on many state and standardized tests. Features: official AP Calculus review questions on the enclosed product CD; computer algebra system; USB cable; more than 2x more memory than the earlier TI-89; EE*Pro application for electrical engineering; easily calculate derivatives and integrals, limits, max/min, sequences and series; solve equations including systems of linear and nonlinear equations; differential equations can be solved numerically, symbolically, and graphically including slope and directional fields; advanced statistics functionality including multiple regressions/tests/intervals, ANOVA 2-way, and goodness of fit; physical constants and unit conversions; powerful vector and matrix calculations and functions and calculation of eigenvalues and eigenvectors. ... Read more


  • USB and I/O ports; includes USB and TI cables
  • Approved for AP, PSAT/NMSQT, and SAT exams
  • All of the features of the popular TI-89, plus extras
  • 188 KB RAM, 2.7 MB Flash ROM, 16 programmed applications
  • 100 x 160 pixel display with split-screen views

Reviews (26)

5-0 out of 5 stars Very good for Statistics and Finance too...
I saw many reviewers for advanced math and engineering. I just want to add that it is also very good for stat and finance. It can be calculated with almost (I'm saying this because I haven't tried every single one yet ;-) every calculation with this TI-89. The plus side is that it has bigger screen and we can change any value anytime without starting over... especially good for multiple problem solving.

At first, I intendeded to purchase TI-BAII+ required by the professor but decided to trade this TI-89 Titanium with my old original TI-89. Both has flash applications for Statistics with List Editor and Finance as well as Data/Metrix Editor. For finance, you can get PV, FV, i, PMT, NPV, IRR, etc.

You can also download guide books from TI's website. This is a life saver for most business classes.... I used TI-89 from advanced algebra, pre- and calculus, fin & managerial accounting, economics, 2 statistics, and financial management... 10 courses altogether ;-) And this IT-89 cost about the same price of a business text book! Of course, you'll need to know the concepts and how to use this calculator first.

If you're wondering which one to choose between original TI89 and this new Titanium, I recommend original if you've vision problem. Original TI89 has deep purple and dark blue colors for "2nd" and "diamond" keys. This new one has very pale blue and light green keys, hard to look at if you need combination keys. SO do for the fonts and "alpha" key. As the manufacturer mentioned, this one has more memory and can be used USB cable.

Just a tip for the two reviewers below and others about fraction and decimal switching (.25 - 1/4 switching) :
Reviewer:MaxiMinerand Reviewer:cool dude (Stockholm)

Just use a "period" between the calculation (if you have all whole numbers) and you'll see decimals in the result without changing the "mode" you preferred. If you have any decimals between the calculations, you'll automatically see decimals. It works for every graphing calculator. I got that tip from a Math Lab Asst. in my algebra lab.

5-0 out of 5 stars Printed manual IS available
Well, it's just a "short" 606 page version for the TI-89/TI-92, but it still beats dealing with 900+ pages from Titanium CD or on-line manual.
Go to epsstore ti com Manuals/Guidebooks under TI-89 and get it for the measly 20+ (seems French and Spanish reading public gets 50% break).
Functionally TI-89 and TI-92 are nearly identical (minus keyboard on TI-89), so you can find very nice books on TI-92, like those from Gilmar publishing, that you can apply to your Titanium.
I had the same gripes as "cool dude" (see review below) about .25 - 1/4 switching until I started working in the exact mode, pressing [diamond][ENTER] (instead of just [ENTER]), when decimals are needed.
Still, if I need to work with fractions and other simple things, I pull out my trusty Sharp EL-506WBBK. To switch from .25 to 1/4 and back you just toggle with the [a b/c] key.
To get a proper function on TI-89 you have to envoke F2,7,2ND,(-),),ENTER. On Sharp: 2ndF, [a b/c].
But then again, Titanium is crafted for much finer things. And how it does them is beyond praise.

4-0 out of 5 stars Great Calculator - small print
This calculator seems to do everything and do it well. My only complaint is that the alternate key functions are somewhat hard to read and the screen can be somewhat hard to read. As you can guess I use glasses. I wish TI would make a screen where the fonts size can be adjusted and perhaps even a backlit screen, otherwise a great product.

4-0 out of 5 stars Tig Class
This Calculator is perfect for advanced math classes. It does more than I could ever believe. The Calculator is simple to use and has a nice screen format. The main problem is that it has so much processes that you actually have to dig got the x radical sign. It can even graph in 3-d. The only thing better is one that has a colored screen.

4-0 out of 5 stars Just a few things....
Perhaps Im little more whiny than you jankees, because I live in Sweden and had to pay almost the double price, since Im not allowedorder it from Amazon. Some complains:

The numbers on the screens are very small, compared to ti-83 for example. I wish their size could have been adjustable.

There are no simple method to get a number fractioned, like make 0.25 into 1/4. You have to go to the mode menue and switch to "exact". Its irritating, on ti-83 you just chose "frac". Maybe Im missing something so if its possible on this I want to know! :P

It just got natural and 10 logarithms. In matlab you can have log2 for example.

Otherwise, this is a really good and flashy calculator that makes all the ordinary ti-83/86 owners go like: " what is that?!". D-) ... Read more

by Texas Instruments
list price: $129.99
(price subject to change: see help)
Asin: B00005NT9E
Catlog: CE
Manufacturer: Texas Instruments
Average Customer Review: 4.5 out of 5 stars
US | Canada | United Kingdom | Germany | France | Japan

Reviews (135)

5-0 out of 5 stars Very good product
This calculator is probobly the best one that i have owned. You can create graphs with it, you can do equations, you can even do complex algebra/trigonometry/calculus on this calculator. Also, for the kids, there are games that you can download quite simply of the internet for you to play in case by any chance you get bored during math class. (Don't get any bright ideas!) I know this product is very expensive, but it is well worth it once you realize how good this product actually is. Do yourself a favor, and buy this product!

5-0 out of 5 stars great calculator
I found this to be a useful calculator in high school.It definitely helped me see a lot of functions and perform experiments.

5-0 out of 5 stars The gold standard for calculators
I purchased my TI-83 Plus in 1999 and still have it today. I have never had any problems with it and can only remember changing the batteries 3 or 4 times. I've even dropped it from my 2nd story balcony by accident (more like a friend knocked it off a table on the balcony) and it didn't break. When I turned it on after it fell, my calculations were still on the screen!

It is easy to use and fast enough for all high school and college mathematics.

I'd recommend it to anyone who needs a workhorse of a calculator.

5-0 out of 5 stars Amazing
This is a fantastic calculator that I use in my algebra class and others.You can take notes on this calculator with the Ti keybord acsseorie the acsseorie comes with a program for the calculator so you can take notes on it and save them for tests. You can also store things like study cards,games,and all those other important things you need. I highly recommend this calculator to anyone with any class.GO GET THIS CALCULATOR!=)

5-0 out of 5 stars Too simple?I think not!
I looked at other more "fully featured" calculators for my daughter and decided against them.It is so easy to buy more than you need in calculators and end up with something too complex/confusing for purpose.Avoid the "my calculator has got more buttons thatn your calculator" syndrome.Better to buy a more complex one in three years for college, if needed - when they will be cheaper and have even more feaures. ... Read more

3. Hewlett Packard 49G+ Graphing Calculator
by Hewlett Packard

our price: $77.99
(price subject to change: see help)
Asin: B0000DK662
Catlog: CE
Manufacturer: Hewlett Packard
Sales Rank: 308
US | Canada | United Kingdom | Germany | France | Japan

Product Description

HP Calculators (F2228A) HP49G+ Graphing Calculator ... Read more


  • Carrying pouch, batteries, and USB cable included
  • 131-by-80-pixel display, up to 9 lines by 33 characters
  • RPN, algebraic, and textbook entry system logic
  • 1.13 MB memory; over 2300 built-in functions
  • Advanced statistical, mathematical, scientific, graphing, and programming features

4. Texas Instruments Voyage 200 Calculator
by Texas Instruments
list price: $199.99
our price: $180.49
(price subject to change: see help)
Asin: B00006D2Q1
Catlog: CE
Manufacturer: Texas Instruments
Sales Rank: 1721
Average Customer Review: 4.5 out of 5 stars
US | Canada | United Kingdom | Germany | France | Japan

Product Description

Texas Instruments (TIVOYAGE200) TIVOYAGE200-The most powerful handheld functionality from Texas Instruments - Voyage 200 lets ... Read more


  • Numeric and symbolic equations; factor, solve, differentiate, integrate
  • QWERTY keyboard for typing
  • Large easy-to-ready 128 x 240 pixel LCD
  • Preloaded with popular applications, including The Geometer's Sketchpad
  • Accepts StudyCards for history, foreign language, English, and more

Reviews (21)

5-0 out of 5 stars A word on documentation
Recently received my Voyage 200, and am very pleased with the unit itself. As others have commented, the lack of a decent printed manual is a drawback.

Knowing that the TI-89 Titanium is functionally almost identical to the Voyage 200, I called Texas Instruments and ordered a TI-89 manual. Customer service was very friendly, the manual was cheap ($4.95 + s/h), and it arrived quickly.

TI really should package this manual with the Voyage 200, and maybe they'll start doing it in the future. In the meantime, if you're getting a Voyage 200, just order an 89 manual from TI.

4-0 out of 5 stars Missing many statistic functions from TI-83
Really good calculator, everything works good, and is really really fast for huge functions. As a statistics major, im a bit dissapointed, because this calculator is missing alot of the random functions the ti-83 had. Everything else good, great buy.

4-0 out of 5 stars On a voyage.
I've had this calculator for a year and a half and I must say it has served me well. Unfortunately, it just pooped out on me. I tried to use it one morning and it would not come on. All it did since the last time I used it was sit on my desk. No drops or anything. I changed batteries and tried all the troubleshooting suggestions on TI's website. Still nothing. I'm still waiting for a response to my emails that I sent two days ago to the TI Cares support.
This thing was great while it lasted but now it looks like I'll have to get another one or maybe that newfangled TI-89 Titanium with the keyboard attachment.

5-0 out of 5 stars Best calculator when you are on move
I had long been an HP fan but Voyage change my perception about TI. When you use graphing calculator you don't need RPN notation. Voyage is one of the best calculator, with its large LCD screen and Qwerty keyboard you have much ease of entering any equation and it appears in the text book form. It does 2D polar plots, parametric plots, Direction fields and can plot in 3D besides solving differential equations of 1st and 2nd order. However its better to use Maple or Mathematica for 3D plots as they are much faster. It also has preloaded Statistics Package so it can do things like Hypothesis testing fot z test, t test, two sample test, chi square, Anova etc. An engineering package for Osculating circles, Rienmann sum, Curl, Divergence etc is also there, though I didn't find it of much help. However it has better algorithm than maple and mathematica for Double and Triple Integrals. If you are taking linear algebra then you can do things like eigen vectors and LU decomposition too, and with programming you can get Jacobian forms also. Good for Calc-I-II-III, Advanced Calculus and Dfeq.Upgrading software is a breeze with link cable and you have a access to a good application programs from TI to suit your need. Overall the calculator is neat, very intutive. It comes with a thin manual because you really don't need it.For other stuff you can visit their website or use the CD to look for any specific function

5-0 out of 5 stars A great product
The voyage 200 is the finest calculator that I have ever had. Its performance is remarkable and it is a user-friendly product. You do not have to remember in which button is the function that you need, or deal with buttons that have impressed three or more function in different colors. Just type the function and that is it. That is simple, is not it?

It is also outstanding the main menu and its easy navigation. You can customize it by adding software applications from the texas instruments web page. The "Computer Algebra" application can solve equations, integrals and much more. "Organizer" mades a nice calendar to schedule activities, classes, and keep track of the important business of you life. "Notefolio" and "Cell sheet" are applications that work as interface for text and data between calculator and computer.

The operative system can be downloaded to the calculator via USB cable with out problems. In conclusion, I believe that is a great product. Just be careful, so many features are not allowed in most of the standardized test and courses. ... Read more

5. Texas Instruments TI-84-Plus Silver Edition Graphing Calculator
by Texas Instruments
list price: $129.99
our price: $132.04
(price subject to change: see help)
Asin: B0001EMM0Q
Catlog: CE
Manufacturer: Texas Instruments
Sales Rank: 1181
Average Customer Review: 4.0 out of 5 stars
US | Canada | United Kingdom | Germany | France | Japan

Product Description

This brawny brainy Texas Instruments TI-84 Plus Silver Edition graphing calculator is fully compatible with the popular TI-83 family of calculators. It also boasts 2.5x the speed and 9x more memory than the TI-83 and is permitted for use on many state and standardized tests. Features: new improved LCD; official AP Biology review questions are included; USB cable for instant computer connectivity; student units will connect with adapter to the View Screen panel or TI Presenter; preloaded with personal study tools like Organizer and Study Cards; 24K of RAM; 1.54MB of Flash ROM; and loads of classroom software including Probability Simulations, Inequality Graphing, Topics in Algebra, Area Formulas, Cabri Jr., GeoMaster, Conic Graphing, Transformation Graphing, Polynomial Root Finder and Simultaneous Equation Solver, CellSheet, Study Cards, TimeSpan, Science Tools, Periodic Table, and Fundamental Topics in Science. ... Read more


  • Split screen, displays graph and editor or graph and table
  • Fully compatible with TI-83-Plus family calculators
  • 1.54 MB of RAM, 480 KB Flash ROM; 30 pre-loaded Apps
  • Advanced statistics and financial features
  • Built-in USB port and I/O port; unit-to-unit link cable

Reviews (8)

3-0 out of 5 stars waste of money
This calculator is a waste of money.If you need a graphing calculator, buy the 83+ or just the plain 84.The 84 is really bulky and not a real improvement on the 83+, the silver edition 84 is even worse - the white looks terrible, and the color face plates are even worse.If you're gonna buy an 84, you should just stick with the regular'll save some money and the blue looks better than the white.You're not getting anything more than what you'd get with the 84.

5-0 out of 5 stars The best i have ever used
This is the best calculator is the best i have ever used. It has a lot of great Apps. it has most of the basics for physics, chem, algebra I & II and a lot more. The keys are also very bright and easy to read. So if u r planning on buying a new graphing calc, go check this this out

5-0 out of 5 stars Wonderful calculator, DON'T BUY A TI83
I got a TI83plus but then it broke. That was probably the luckiest thing that could happen. This calculator is great!! Its fast, its pretty, and its really useful for school. DON'T EVEN LOOK AT THE TI83s BUY A TI-84-Plus Silver Edition Graphing Calculator ITS WORTH THE MONEY!!!!

2-0 out of 5 stars TI-89 Titanium
Ive used this calculator for awhile, then switching to the TI-89 Titanium I realized the TI-89 Titanium is in so many ways better then the TI-84 Plus Silver Edition. The TI-89 Titanium has a Symbolic Math Guide which will show you the answer and the steps it took to solve it. Either get a TI-89 or TI-89 TItanium!

5-0 out of 5 stars I Loved It!!
This calculator is great! If you download some of its applications, it can help you with almost all subjects in high school and some courses in college. You can share information with other calculators and recieve application information. It not only helps you with math courses, but with science and other courses. It's helping me, and it could help you too. ... Read more

6. Texas Instruments TI-84-Plus Graphing Calculator
by Texas Instruments
list price: $109.99
our price: $107.34
(price subject to change: see help)
Asin: B0001EMM0G
Catlog: CE
Manufacturer: Texas Instruments
Sales Rank: 3056
Average Customer Review: 4.0 out of 5 stars
US | Canada | United Kingdom | Germany | France | Japan

Product Description

This Texas Instruments TI-84 Plus graphing calculator is faster than the popular TI-83 and it's fully compatible with the TI-83 family of computers. A split screen function lets you display graph and editor or graph and table. Features: permitted for use on many state and standardized tests; keystroke-for-keystroke compatible with the TI-83 Plus; new style and an improved LCD; 2.5x more speed than the TI-83 Plus; 3x more memory than the TI-83 Plus; USB cable for instant computer connectivity; preloaded with more software for classes including Cabri Jr. interactive geometry software; and all student units will connect with an adapter to the View Screen panel or TI Presenter. ... Read more


  • Split screen, displays graph and editor or graph and table
  • Fully compatible with TI-83 Plus; now faster, more memory
  • Advanced statistics and financial features
  • Built-in USB port and I/O port; unit-to-unit link cable
  • 11 pre-loaded Apps, including Cabri Jr. and Science Tools

Reviews (6)

4-0 out of 5 stars less is more.
I am on my third TI-83+ (my first two were stolen).My brother owns an 84, and I can tell you that it offers nothing that the 83 doesn't have.Many of the preloaded apps are useless (an address book?please!), and take up so much space that the memory increase is worthless.The 84 is a continuation of TI's tendency to offer huge amounts of style with little or no substance.I prefer the 83 for its streamlined design.The one improvement is that the slip cover on the 84 does not become loose with a great deal of use, which is a problem I have encountered with my three 83s.It looks as though the USB connectivity could be a plus (for the 83, you had to buy a separate connectivity kit to connect to a PC), however, most buyers will not need to connect their calculator to their PC.

5-0 out of 5 stars VERY helpful!
Since I am in the higher math, I really needed a graphing calculator. So we saved up some money and got this.... and it helps so much! I don't really have anything to compare it too.... it is good for people in algebra and up though. and just fun to mess around with :D

5-0 out of 5 stars Best School Supply Ever!
This calculator is hands-down the best I have ever had the honor of using. While the TI-84 Plus may not have as much space or as many pre-loaded Apps as the TI-84 Plus Silver Edition, the TI-84 Plus offers everything a high school (possibly some college) math student needs in order to successfully learn and solve mathematics material. The TI-84 Plus comes loaded with several Apps that will make things even more convenient, such as a Probability Simulator and Cabri Jr., a great geometry app. Student looking to upgrade from the TI-83 Plus will find comfort in the fact that the TI-84 Plus is 2.5x faster and has 3x the memory than the TI-83 Plus. The TI-84 Plus is also extremely easy to hook up to your computer to transfer new Apps and updates to it using the USB port and the included USB cable. The TI-84 Plus will be a great investment for any student's education.

5-0 out of 5 stars A great improvement on the TI-83 Plus
The new TI-84 Plus is a wonderful calculator.If anybody has had the TI-83 or 83 Plus, they know how easy and reliable it is.The 84 Plus is an all-around imprivement on the older version and even worth the additional $15-$20.I have had it since school started and have noticed than any problem I enter, it is solved immediately upon pressing enter, or solve.The speed is a great improvement over the 83-Plus.The computer features are nice, but rarely used by myself.For anybody who is supposed to buy a TI series calculator for school, the 84 Plus us definitely the one to pick up this year and for the next few years I assume.Easy, fast, reliable, durable, and even sleek.As long as you handle it properly and use it enough, you will get all of your $110 out of the TI-84 Plus.

1-0 out of 5 stars DIFFICULT TO USE!
i bought the calculator to school, after countless times of plugging it to the computer and trying to send stuff, it diddnt work. What infuriated me the most was that after paying 110 dollars for the thing, texas instruments website didnt give me an answer. ... Read more

7. Texas Instruments TI-89 Advanced Graphing Calculator
by Texas Instruments
list price: $190.00
(price subject to change: see help)
Asin: B00000JF55
Catlog: CE
Manufacturer: Texas Instruments
Sales Rank: 1816
Average Customer Review: 4.5 out of 5 stars
US | Canada | United Kingdom | Germany | France | Japan

Product Description

MODEL- TI89TITANIUM VENDOR- TEXAS INSTRUMENTS FEATURES- TI89 Titanium Graphics Calculator Introducing TIs most powerful graphing calculator: The TI-89 Titanium, offering new features, preloaded Apps, and even more versatility. A built-in USB port makes data transfer ultra- convenient. Plus, with three times the memory of the TI-89, you can store more Apps, data, and programs. The TI-89 Titaniums advanced functionality and 3-D graphing make problem-solving for AP advanced mathematics and engineering courses infinitely easier. It is the most powerful TI graphing calculator allowed for use on the AP Calculus, AP Statistics, AP Physics, AP Chemistry, PSAT/NMSQT, SAT I , SAT II, and Math IC & IIC exams. Includes calculator with preloaded applications, USB cable and a Product CD (full reference manual, free apps, and more).* Electronically upgradeable graphing calculator gives you the most up-to- date functionality and software applications (Apps).* About 188K bytes of user-available RAM* About 2.7 MB of user-available Flash ROM for data archive and Apps (3x the Flash ROM memory of the TI-89).* 100x160 pixel display* Internal clock with date and time display* Icon desktop that allows easier access to Apps and editors* USB port for computer connectivity, unit-to-unit communication with TI-89 Titanium graphing calculators, and more.* I/O port for communication with other TI products* USB unit-to-unit link cable included * TI Connectivity Cable included* TI Connectivity Cable and TI Connect software allow information to be transferred to and from a computer and printed or stored on disk.* Included Apps: CellSheet EE Pro Finance French Localization German Localization NoteFolio Organizer Polynomial Root Finder Simultaneous Equation Solver Spanish Localization Statistics with List Editor (English, French, German and Spanish versions). StudyCards Symbolic Math Guide* Apps are available from TI and other leading developers.* Advanced Mathematics Software functionality is suit... ... Read more


  • Over 500 KB memory for storing functions, programs, and data
  • Pretty Print technology displays mathematical expressions as they appear in textbooks
  • High-resolution display with split-screen views
  • Computes symbolic solutions to differential equations
  • Input/output port and cable; also supports optional TI-GRAPH LINK

Reviews (160)

4-0 out of 5 stars Excellent but user unfriendly
THis machine does it all provided that you learn how to use it well. I spent quite some time on this calculator and I am very confident using it now. However it could have been more user friendly.

5-0 out of 5 stars DO NOT BUY unless you are in calculus
PUBLIC SERVICE ANNOUNCEMENT:This is a fabulous calculator (thus the five star rating), but inappropriate for students in math below calculus.Below calc, most courses that require a graphing calculator are geared towards the 83/84, so unless you are very comfortable with the 89 it may prove difficult to translate in-class activities onto an 89.Do not even THINK about buying this calculator unless you are taking calculus or a calculus-based course.Stick with the 83/84.

5-0 out of 5 stars Sweet Calculator (For Calculus ETC)
Awesome calculator. Last class I used it for was Calculus for Engineering I. I like the "pretty print" which will display equations exactly as you would right them. The calculus tools, and the resolution of the screen, and the ability to scroll through previous equations.

My favorite T1 so far that I've used.

5-0 out of 5 stars Essential for Calculus and beyond
Once the essentials are learned in any field, its great to have a tool to do the busy work quickly.The Ti-89 calculator by Texas Instruments performs all the functions you'll need to do this busy work.Being able to use SmartText to display integrals, differentials, taylor series sums, etc. allow the user to clearly identify any mistakes.A lot of technology has been pumped into this little machine seeing as calculator programs are written using only the functions +-/X.There are many submenus's withen keys that are color coded for easy recognition as well as on-screen displays for menus.Dual menus are also handy for comparing graphs and calculations.Programming is a sinch with the instuction book and downloading programs is possible with the add-on cable.There are thousands upon thousands of programs written for math, economics, accounting, etc. that will allow the user to drastically expand the functionality of this calculator.5 Stars.

5-0 out of 5 stars Great Calculator
I bought this calculator after having used a TI-83+ for a few years. The power in this little machine is incredible (and in fact uses the same processor as the Macintosh Classic computer from 1991) and the display resolution is fabulous, especially compared to the older calculators. While I have yet to use some of its more advanced functions, the ones I've used have been great. Some of the functions from the TI-83 are moved and take a bit of adapting, but after a few weeks you'll love the menus so much you'll never want to use a TI-83 (or a regular scientific calculator) again. ... Read more

8. Texas Instruments TI86 Graphing Calculator
by Texas Instruments
list price: $150.00
our price: $105.44
(price subject to change: see help)
Asin: B00000JF53
Catlog: CE
Manufacturer: Texas Instruments
Sales Rank: 4928
Average Customer Review: 4.5 out of 5 stars
US | Canada | United Kingdom | Germany | France | Japan

Product Description

Texas Instruments (TI86GRAPHICS) Texas Instruments, Inc. TI-86 is a graphing calculator with 8 display lines, displaying 21 c ... Read more


  • Input/output port
  • Graphing functions
  • Powerful calculus features
  • Function evaluation table
  • 128K RAM with 96K user-available

Reviews (38)

5-0 out of 5 stars The Most Straightforward Calculator Available
I have the TI-89 Titanium and the HP-49G+, both are excellent calculators especially for programmers.But if I need to have mathematical models/programs, I use Mathcad or Matlab on my PC anyway, hence, I don't use the TI-89T or HP-49G for that purpose. Although there are fancier/faster models available now, the elegant keypad and menu system of the TI-86 is unmatched.For me and for most people I know (mostly fellow engineers), the TI-86 (and HP-48GX) are the perennial favorites.There is a dramatic difference between the TI-86 and the TI-89 as far as the menu system goes.The TI-89 has so many functions that the only way to really implement it is through a "windows" type menu system.The TI-86 on the other hand, has all the critical functions on the keypad - which is more efficient.(i.e. x^2, 1/x, complex, convert, log, etc..... are all built-in to the keypad of TI-86).

Indeed, the TI-89T and HP-49G+ are faster, has more functions, and has more memory than the TI-86.But for the day-to-day engineering and scientific calculations, I think the TI-86 is far more efficient and straightforward.

3-0 out of 5 stars Best Graphing Design but problems with wear and tear.
i am actually shopping for an HP49 or similar. My experience with two calculators from texas instrument the TI86 and TI83+ has been positive and actually excellent if ease of use and graphics performance is the criterions. They are very well designed and the graphics as of the last generation TI's were superior than there previous hp48g.
However, the problem with both the TI86 and TI83+ is in how long they last. I bought a used TI86 in about 1997 and it lasted maybe one more year before it stopped working correctly. Recently a TI83+ I had which from the standpoint of functionality was a fine calculator stopped working after generally light use after 5 years. considering I used relatively infrequently, I wasn't satisfied.I used to own an early HP back in the 80's and it never stopped working for at least 6 or seven years until it was stolen out of my backpack. I was loyal then to them, but the last generation of calculators seemed to have some design flaws(hp48g) particularly around graphics. This generation seems to be immitating the TI's now and if they are built as well as the early ones, it is worth paying a little extra. But i haven't tried them out yet.
The last one I had(48g) was stolen or lost somewhere I believe but it continued working fine for maybe two years.
After spending onehundred plus dollars Iexpect more from a calculator in terms of wear and tear.

5-0 out of 5 stars Very Useful calculator
I bought this around mid 1997 and I'm still using it to this day.
It's helped me through AP Calc, Calc II, Calc III, Differential Equations, Advanced Engineering Math, SATs, GREs, Fundamentals of Engineering exam for EIT certification, and etc...

I actually bought a TI-89 around soph year of college just to complement the TI-86.

You see, the TI-86 is a SOLID engineering calculator. It's got fast units conversions, an intuitive and FAST menu system BUT it lacks "pretty print", handling of units for math (keeps the units throughout equations, calculators), and integration/differentiation with the variables in place (it doesn't just evaluate it). With the right software, the TI-89 is a very powerful math tool.

I used the TI-89 primarily for theoretical math but came in handy for standardized tests as well.

I would recommend getting both the TI-89 and TI-86 and start familiarizing yourself with both calculators before you start tackling tests. Check the rules and regs for calculators also - standardized tests should allow the use of the 86 and 89.

Overall, the TI-86 is a solid math tool - notice I say TOOL because that's what it is. If you have no idea what you're doing in class, the TI-86 won't give you an A.

My recommendation is to get both the TI-86 and TI-89.
Just FYI, I'm still using the TI-86 at work. The buttons show some wear and I lost the first line of the LCD because I dropped it in college. Nonetheless it's still chugging along.

Also, slap in four 750mAH NiMH batteries. You will NOT regret this because these calculators drain alkaline batteries in half a semester of intensive use. We didn't have cheap NiMH batteries back in the day - TI actually pushed the use of Rayovac Renewals (remember those rechargeable alkalines that only lasted 5 charges?) and our other choice was NiCd. Forget all that. Slap in four Energizer 750mAh NiMH batteries and you'll save yourself a LOT of money in the long run. That means more money for video games and other forms of entertainment in college.

5-0 out of 5 stars Need a calc for engineering work?
Or require lots of fast unit conversions?

Get the TI-86.

It's menu system is extremely intuitive and easy to use. You can fire away units conversions and simple math w/o running into any problems. In Comparison, the TI-89 is more powerful, has a better CPU, and has more memory - but the TI-89 shines in its simplicity. It's quite powerful in the right hands and is more useful in the workplace. The TI-89 is more suited towards the classroom environment.

I bought one of the very first TI-86's in 1997 and used it throughout high school, college, and a few graduate courses. I still carry it around at work because it's been a big help.

I dropped it once and lost the first 2 lines on the LCD, but it's still chugging along fine.

Just get 4 NiMH AAA batteries and you'll be fine for years to come. I made the mistake of using Alkalines, Rechargeable Alkalines, and NiCD batteries back in the late 90s when NiMH's weren't readily available.

5-0 out of 5 stars You got to know whats up( From a programmer, I know. )
I used to have a ti-83, and a ti-83+, but the 86 is the best of the three. I am real into programming the calculator. The 86 can have variables and Lbl's with up to 8 charectors, opposed to 2 for the 83, 83+. It can store almost unlimited amount of pics, unlike the 83,83+, which can only store 10. The calculator also does conversions. Everything from temp to energy to power, making it save all that time on tests and homework. I read another review that said it could not do absolute value(which is called abs), and convert fractions to decimals(>frac, and >dec), but it can. They aren't under a bunch of subfolders either, because you can easily create your own custom menu to paste anything you want on the screen. This way is even faster. It also comes with an excellent instructional manual. By far the best choice between 83, 83+, and 86. ... Read more

9. HP HP48GX RPN Expandable Graphic Calculator
by Hewlett Packard
list price: $265.00
(price subject to change: see help)
Asin: B00004TFKZ
Catlog: CE
Manufacturer: Hewlett Packard
Sales Rank: 13130
Average Customer Review: 4.5 out of 5 stars
US | Canada | United Kingdom | Germany | France | Japan Review

Hewlett-Packard's HP 48GX is the most powerful calculator in the 48 series, offering the same advanced calculation and programmability features as its siblings, along with expansion options that should appeal to power users and programmers. All this is made possible by the expansion card slot, which lets users expand the built-in memory from 128 KB to a maximum of 1.256 MB or install application software that adds more advanced features to the calculator.

The 48GX is no slouch. Its colorful array of buttons lets users tap into 2,300 built-in functions, 300 of which are built-in formulas and scientific constants that encompass the spectrum of the mathematical and scientific fields. It handles everything from basic algebra equations to advanced trigonometric and statistical calculations. Best of all, if the 48GX doesn't have a feature you desperately need, you can use the built-in object-oriented programming language to create functions from scratch. You can then label your creations and access them as you would any other feature that is integrated with the calculator.

The 48GX uses reverse polish notation (RPN, also called postfix notation), which can be difficult for beginners to grasp, but advanced students and professionals will appreciate RPN's elegance and relative simplicity. An optional connectivity kit lets users connect the device to a PC to download new equations and software, and the integrated infrared port lets you share data with other calculators or output your graphs, plots, or other results to a separately available infrared printer. Typical students may want to opt for a less expensive (and less expandable) calculator in the 48 series, like the 48G+, but for those who demand the best and may need more than 128 KB of memory, the 48GX is the clear choice. --T. Byrl Baker


  • RPN can speed data entry with practice
  • Expansion slot adds extra memory and software options
  • Programmable, so you can add nearly any feature you like


  • Cluttered keypad
  • Learning RPN and basic object-oriented programming can be daunting for the uninitiated
... Read more


  • Over 2,300 functions including over 300 for scientific and engineering applications
  • Built-in equation library with over 300 formulas and constants
  • 2-way infrared communication, RS-232C serial port; supports optional printer
  • 128 KB memory; 2 card ports for expandable RAM and ROM
  • 2-D and 3-D graphing capabilities

Reviews (36)

5-0 out of 5 stars Stack is different.This required learning
To store '5' on the HP48 line of calculators, hit 5 [enter].It's stored.You can even see where it's stored right away because you're always looking at the bottom four stack entries.It seems the previous reviewer believes that the way TI does calculators is the way calculators should be done.If that's you, buy a TI.Storing a value in a named variable is a fundamentally different way of thinking about calculation from the way HP decided to do it.

With RPN, there is very rarely any need for a named variable and it only took me about an hour to start using this calculator for fairly complex EE homework.One of the things I noticed about RPN fairly quickly is that if you're doing complex calculations, you'll often build up intermediate values and then bring the intermediate values together at the end.My study-buddies were always writing down their intermediate values, I just left them on the stack while I did the other calculations.More often than not, those previously calculated values were exactly where I needed them when I needed them later.Everyone else was punching back in the values that they had previously written down (with the possibility of error on each transcription) or trying to remember which variable they had stored them in.

I don't mean to ding the TI approach, I used to work at TI and I think they make a great product.I simply think that the HP has a subtly better philosophy of calculation and a massively better keyboard in the 48s/sx/g/sx line of calculators.

5-0 out of 5 stars The Mercedes Benz of Calculators
Being a college professor of Electrical Engineering for over 30 years, and having used numerous brands and models of calculators and having written reviews of some of them for various publications, there is no doubt in my mind that the HP48GX is indeed head and shoulders above all the other calculators (even the HP49).The RPL entry system is a natural and easy to learn process that mimics the pencil and paper approach that we've all learned in Grammar school arithmetic.The efficiency of input and the ease with which it handles comlex-number calculations is second to none.Formulae can be entered with mixed units and the calculator automatically performs internal conversions to present the answer in whatever valid units you desire. It handles 2-D and 3-D vectors with all the corresponding mathematical operations seemlessly. The infrared connectivity (wireless) and RS232 port (wire) both allow communication between another HP calculator and your computer.This calculator has the right mix of 'function per key' versus 'menu per key' that makes it very easy to negotiate.
One can enter a formula in algebraic notation and the calculator can solve for one of the variables in symbolic and/or numeric form (if all the other vales are specified). The keystroke error recovery facility is superb.A couple of days with this calculator and most people cannot go back to their old 'Algebraic Operating System' calculators, with its cumbersome parenthesis, without making a mistake.
There is not enough space here to praise this calculator to the extent that it deserves.Over the years with all the students and professionals I've had contact with, I know of no one who has ever regretted purchasing this calculator except for the fact that they realized that they waisted money on purchasing their AOS calculators.

1-0 out of 5 stars They show you this one, and sell you a different one
I have ordered this calculator and then the place sends an email and it is changed to a 48gII instead of this one.Please look into this before you buy.

5-0 out of 5 stars HP and RPN Entry
Sorry if this is a little off the topic, but I guess you could say HP sent me here.....
I own a somewhaz tired HP32SII...ands wanting to replace it, naturally, I looked at HP first as I did not want, nor have I ever needed an "Equals" key:-)

What i found amazed me...not only is my 32SII worth about 400.00 dollars now, there are no more to be had...suddenly it doesn't look too tired!I continued to look for HP's RPN offerings, and found, other than the 48, they don't have any RPN Calculators anymore.I was told that they have something under development,due out in late Fall or early Winter.They did not say it was RPN, nor did they quote a "Ball Park" price, so I can't wait!

Has HP lost its collective mind?Is anyone in HP product development or Sales following this discussion?I hope so.

By the way, I paid around 45.00 dollars for my came with a great soft cover manual, about 160 pages, and is the best calculator I ever owned.It replaced my 70's era HP33E, which I still have.....Wonder what that is worth?

Thanks for allowing me to vent!

5-0 out of 5 stars PE = Paranoid Extremist
This is without a doubt, the best calculator ever made for engineering calculations and tasks.Unlike a laptop, it never runs out of battery power in the middle of a design, can be used easily on a plane, can even be used in techincal customer meetings or on the shop floor to check things out that need checking.In an age of spreadsheets and complex analyis programs, it is often forgotten how useful a competent engineering calculator can be to a practicing engineer.It is also invaluable to students of engineering for assignments and exams.Speaking of which, the MN (and soon NCEES) policy has changed so that this calculator is no longer eligible for use on the PE or FE exams.This is due to its ability to transfer data to others, and that one can type text into it.Using the time functions of the calculator, and some personal time trials on the practice exams, I estimated that it would take the average test taker around 1 week to type in even a portion of the test with the limited alpha numeric capabilities of the keyboard, and then transmit it through infa-red to a waiting accomplice 3-4 ft away (given best transmition speed).You would almost certainly be spotted during this activity, and forced into some form of slave labor camp or fast food restaurant. As I am sure most of you considering purchasing this calculator are indeed planning this type of criminal intent, I must warn you that you better think twice because they are on to you.However, those rare, honest engineering and technical types with a minor amount of integrity that somehow leaked into their character could reward themselves (after passing the test using a slide rule, an abacus and some rocks) with a fine tool such as this calculator.They are getting harder and harder to find, so I would buy one while it is available. (The alternatives I have found so far for my upcoming test are kind of like trading a Land Rover for a skateboard).The add-on cartridge with the additional 670 equations, constants and tables needed for the PE exam is pretty good too but may soon require a special permit to own. ... Read more

10. Texas Instruments TI83 Graphing Calculator
by Texas Instruments
list price: $99.99
(price subject to change: see help)
Asin: B00000JBO8
Catlog: CE
Manufacturer: Texas Instruments
Sales Rank: 3936
Average Customer Review: 4.5 out of 5 stars
US | Canada | United Kingdom | Germany | France | Japan Product Description

Perhaps if we'd had this calculator in high school we would have done much better in trigonometry. The Texas Instruments TI-83 is an ideal unit for any math student, combining powerful features for graphing and statistical analysis.

The LCD screen displays 16 characters over 8 lines. Though the TI-83's keyboard layout might seem daunting to those who've never laid eyes on a graphic calculator before, the helpful, if intimidatingly thick, manual will get you up and running quickly.

The TI-83 includes function, parametric and polar, and sequence plot modes. You can store, graph, and analyze up to 10 functions, 6 parametric and polar functions, and 3 sequence functions. The TI-83's Draw operations allow you to annotate graphs. Along with the advanced math and science features, the TI-83 also includes such financial functions as cash flow, amortization, and time value of money.

The included input-output cable lets you link the TI-83 with another TI-83 or a TI-82 for data sharing, and the optional TI-Graph Link software lets you transfer files to a PC. ... Read more


  • Input/Output port
  • High contrast display
  • Many graph styles to choose from
  • Use side-by-side with the TI-83
  • Advanced statistics and finance

Reviews (26)

5-0 out of 5 stars I love my TI-83!
I bought this calculator when I started high school and I have not needed a new calculator since.It has served me well for 7 years and is still going strong.Perfect for everyday use and for any other use should you need its higher functions.I also find it very easy to use!

5-0 out of 5 stars Like an old buddy...
I have been using my TI-83 for over 6 years. It is the most reliable item I have ever purchased in my entire life. It construction is of very high quality: encased in durable, thick plastic with a highly readable screen and equally-sturdy plastic buttons, it does so many things, and does them well: graphing functions, programming support(similar to Assembly--fun!), probability and statistics options, an tons more that I haven't even explored. The instruction book is several hundred pages long and explains in excruciating detail what this baby does. The TI-83 is perfect, and just plain "feels right". This great indoorsman gives it a "must-buy" rating.

5-0 out of 5 stars worth its weight in gold
I'm in College Alegbra this semester and only starting to learn all the wonderful things that the TI-83 can do for you.With the TI-83 I feel so much more confident and it really shows in that my grades do improve.(It helps when you know the equations to do the problems with. ;-))I would definitely recommend this graphing calculator to anyone who needs it in college or in high school.It's invaluable.
It's also good for those days when you simply can't study and need something to occupy your time with.Hint:Use the Program feature.In the past, I used it to go on trips with.Talk about a dual-purpose gameboy!
I hope you enjoy your TI-83 as much as I did... er, do.I'm not giving it up that easy.

5-0 out of 5 stars Great Calculator
I first used this calculator in high school.I found it very useful in solving just about all types of mathematical problems.I've used it all throughout college and graduate school.It is very easy to use.It comes with a thick instructions book (very helpfull). Batteries last a very long time.I would also recommend the TI 83 PLUS calculator.

5-0 out of 5 stars Awesome Calculator!?!?!?!?!
This Calculator is the best there is cause you can do Arithemitics, graph, Angles, Geometry,.......(I could go on forever, so I stopped.)You can even play games on it!!!!!
...Get this for school! ... Read more

11. Casio CFX-9850GB Plus Graphing Calculator (White)
by Casio
list price: $139.99
our price: $71.24
(price subject to change: see help)
Asin: B00004TVDN
Catlog: CE
Manufacturer: Casio
Sales Rank: 8310
Average Customer Review: 4.5 out of 5 stars
US | Canada | United Kingdom | Germany | France | Japan

Product Description

MODEL- CFX-9850GPLUSVENDOR- CASIO FEATURES- Color Power Graphic CalculatorThe CFX-9850GCPlus has over 900 functions with 21 characters x 8lines, 15 Digit - 10 + 2 Display and 64KB Total Memory. With the ... Read more


  • 38 programs
  • Over 900 functions
  • 21-character-by-8-line display
  • 15-digit, 10-plus-2 display
  • 32 KB total memory

Reviews (16)

5-0 out of 5 stars This calculator will last forever!
I bought my Casio CFX-9850GB Plus in 6th grade for Pre-Alg. and I'm now in 11th grade AP Calc, and my calc. still works like it did 5 years ago. The color screen is a life-saver when graphing multiple ftns. or just for something pretty to look at. It's equation solver is great for tests, and the easy-to-use menu is much better than that of the TI-graphing calcs. Also, it has been in my backpack for years, and I drop it almost daily, but it hasn't affected its performance at all. At $70, this is a bargain, and it may just be the last graphing calculator you'll ever need!

5-0 out of 5 stars Beats the TI-83
I am a math teacher at a new private Bronx high school, and compared the TI-83 with the Casio in numerous regards before deciding which one our school would use. Hands down, the Casio wins, and it is cheaper as well. Note - I do not work for Casio or TI.
A) The calculator is more user friendly. The options are menu driven in a more intuitive way. What took me a minute or two to locate and figure out out the TI, took less than half the time on the Casio. Don't trust me- see for yourself.
B) The Casio is slightly faster than the TI
C)Features: The casio adds a dynamic graphing system (lets you change a coefficient and watch the graph change), which is very useful when teaching. I also like the EQUA feature, which lets my students calculate 2/3 equations, 2/3 unknowns, and solve quadratic or polynomial equations. Maybe the TI does this too, but I couln't figure it out.
D) The color thing I suppose is nice, but I use the CFX-9750, which is black and white and cheaper.

The only downside is that most colleges use the TI's, unfortunately. I liken it to most places using Microsoft when there are better alternatives out there (monopoly power). Anyway, a student who uses the Casio can do anything the TI-83 can do.
I'm a big fan, and my students seem to like it.

3-0 out of 5 stars CASIO -- "The Unexpected Extra®"
The Unexpected Extra is the cost of the computer cable and software (an optional extra purchase). It's nearly equal to the price of the calculator. That adds up to roughly the same price as the far more advanced TI-89 Titanium kit with cable and software included.

5-0 out of 5 stars A real babe magnet
Ive had this calculator for a year and it is a testiment that something can be attractive and geniusly engineerd. Never have i recieved such complinents for owning a calculator. It makes the texus instruments look like typewriters the technology is so much better. People come up to me and want to play with it, and i say, "Yes ladies... its a casio." Truley an ingenius tool.

5-0 out of 5 stars Great Calculator
I bought this calculator before i enetered the 9th grade.Everyone in my class had the Texas Instruments TI 83 so i wanted to be different so i bought the CFX-9850GB Plus.It was the best desicion of my mathemtics life.Aftewr my friends saw the features and the user friendly menu they also decided to buy one.It has more features than the TI 83 and is easier to use.It is a bargain at the price it is being offered at.Even if you already have a graphing calculator i suggest buying one ASAP. ... Read more

12. Texas Instruments TI-92 Plus Graphing Calculator
by Texas Instruments
list price: $250.00
(price subject to change: see help)
Asin: B00000JBO3
Catlog: CE
Manufacturer: Texas Instruments
Sales Rank: 18289
Average Customer Review: 4.0 out of 5 stars
US | Canada | United Kingdom | Germany | France | Japan Product Description

With more power than most of us had in our PCs less than 20 years ago, the TI-92 Plus graphing calculator is the machine of choice for students and engineers both at the desk and on the go. It comes with over 500 KB of memory and software for working through algebra and other mathematic problems quickly and easily.

With the TI Graph Link accessory (not included), you can connect to computers and even download software upgrades. Solve linear and nonlinear equations, use the Pretty Print feature to see equations in textbook format, and work with 3-D surface graphs in real time. The QWERTY keyboard is rugged and easy to use, the 128 x 240 screen is easy on the eyes, and the calculator comes with a durable shell to protect its face when you're traveling or in the field. Additional accessories can turn the TI-92 into a mobile data-collection station, but it's just as useful at home.

Students beware: Some professors and teachers discourage, or even ban the use of calculators like the TI-92 in their classes, so make sure it's OK before you buy. Once you're set, the manual is clear and straightforward--you'll be programming in no time. Ultrageeks will love the assembly-language option, but the rest of us can get by just fine with the regular interface. The old timers might still cling to their slide rules, but anyone who needs a calculator for school or work can see why the Texas Instruments TI-92 is so popular: Its versatility, power, and portability give you the number-crunching power of a computer no matter where you are. --Rob Lightner


  • Powerful mathematics software
  • Easily upgradable
  • Handles advanced math well
  • Easy to read and use


  • Large size
  • Relatively high cost
  • May not be permitted for some classes or standardized tests
... Read more


  • QWERTY keyboard and large display; real-time rotation of 3-D surfaces
  • Electronically upgradable using flash technology
  • Input/output port and cable; also supports optional TI-GRAPH LINK
  • Over 500 KB memory for storing functions, programs, and data
  • Pretty Print technology displays mathematical expressions as they appear in textbooks

Reviews (35)

1-0 out of 5 stars NEEDS HIGH CONTRAST DISPLAY!!!
I'm sure the capabilities are wonderful. That's why I bought it. But, it was so difficult to use - because I couldn't see what was on the low contrast (even with adjustment) display - that it wouldn't have mattered if it had outclassed a Cray. I couldn't program it without getting a headache from eye strain.If it had a decent display, it would be great. Without reasonable input and output display, it is just a piece of junk!

4-0 out of 5 stars Make sure it is a Plus!
This is a great calculator, but because Amazon does not have a category for old ti-92's, people often sell these as PLUS models. The only major differences are things Linear Algebra, upgradable firmware, and extra memory. You will want the extra memory if you write custom programs. Before buying one of these, email the sellerand confirm it is a plus model, unless you dont care. Enjoy!

Art Ketcham

5-0 out of 5 stars The Ultimate Calculator
Reasons why the TI 92 Plus is the ultimate calculator,

1) Unique Qwerty keyboard: Immensely useful.
2) Largest screen on a calculator.
3) Very powerful and sophisticated Computer Algebra System.
4) Ability to add programs and features.
5) Makes Casio/Sharp look pathetic.
6) Completely blows the competition away.
7) Capable of solving just about every mathematical problem
known to exist.
8) Banned by exam boards the world over because of its

5-0 out of 5 stars Magnificent!!!!!!!!!
If you are a college student, or anyone who deals with math, I highly recommend that you purchase this calculator.It is an excellent tool for performing many types of calculations both in algebra and, seemingly, in calculus, although I have only used it for algebra so far.Unlike other, disappointing graphing calculators, this one permits you to use undefined variables (i.e., 'x' stands for nothing except 'x' unless you want it to, which is immensely helpful in performing algebraic calculations.) The QWERTY keypad also makes entering expressions a pleasure, rather than a chore; this is more than an academic point when you have a test with a time-limit, and hitting an 'alpha' key before typing every variable depicted with a letter (a,b,x,y, etc.) can use up precious time and maybe ensure that you don't get all the problems done.There are too many easy-to-use and incredibly convenient features in this calc to list here; but it truly is worth the hefty price tag.My only gripes are that the manual is sometimes a bit obscure (though it's easy to comprehend compared to most graphing calc manuals) and that the calc has no nthroot function that I can find, that is, to find the cube root of a number you have to enter it as x^1/3.These are very minor points, though, in a splendid product.

5-0 out of 5 stars Works for me
Exactly what I said: works for me.Go for this rather than the plain ol' TI-92; this has some features definitely worth the extra cash. ... Read more

13. HP 48GII Graphic Calculator (F2226A)
by Hewlett Packard
list price: $129.99
our price: $99.74
(price subject to change: see help)
Asin: B0000DK65Z
Catlog: CE
Manufacturer: Hewlett Packard
Sales Rank: 13341
Average Customer Review: 3.5 out of 5 stars
US | Canada | United Kingdom | Germany | France | Japan

Product Description

HEWLETT-PACKARD (F2226A) 48GII Programmable Graphing Calculator, 131x64 pixels,128KB,RS232 Port, IRdA ... Read more


  • RPN, algebraic, and textbook data entry modes
  • Serial and IrDA ports
  • Makes 3D graphs, 2D and 3D plots
  • Over 2,300 built-in functions
  • 128 K memory, 80.7 K available for programming and data storage

Reviews (6)

1-0 out of 5 stars why not get a HP49g+? Look at the price!
at the time of writing the HP49g+ is available on
amazon at $77.99. Since the 48GII is a 49g+ with
features removed - why not get a 49g+ ?

3-0 out of 5 stars Hold on to your 48GXs
I had high hopes of this calculator being a "real" 48G, maybe with a faster processor running an EMU, but the original case/key design and ROM.

My trusty HP48GX no longer functions properly, the 3, 6, and 9 keys fail to register when pressed.

Bill Hewlett and Dave Packard would join me in my sadness and disappointment at the lack of innovation at HP, and the pathetic replacements offered to the fine 48GX, the lowly, rubber keyed, algebraic entry, plastic faced, 49G and 48GII (both of which I have tried and rejected).

Upon inquiry to HP customer support about the possibility of getting a 48GX repaired, it became apparent that the cheap printers they make, Carly's merger with Compaq, and Hewlett Jr.'s denouncement of the company's current direction are indicative of the level of service and quality of customer support technicians hired by HP, [...]
While searching for a replacement for my 48GX, I encountered a strange phenomenon, used HP48GXs are selling for twice what the new flagship HP calculator costs, and as much as $400-$900 for the few unused 48GXs still around.This is a testament to the failure of HP to continue to provide innovative products, and to the brilliance of the engineers and programmers of the original 48GX at the now defunct Corvallis research facility.

How can a nearly 15 year old technology product still remain the most desirable and sought after in it's class?Only through initial brilliance coupled with the failure of executive management to develop and support the innovation required to improve such a product rather than trying to replace it with a lesser machine.What right-minded consumer would purchase a 49 to replace a 48?

Alas, we have witnessed the demise of the only truly innovative producer of engineering calculators.What does the slogan "HP Invent" mean today?

The talent behind the last several 48G ROMs, Jean-Yves Avenard and Gerald Squelart have given me renewed faith in the future of calculators. After being fired by the new HP, they have taken it upon their selves to create the finest calculator in the world, the Qonos, and I eagerly await it's release. [...]

In the meantime, I am about to embark upon an all-or-nothing attempt to service my own HP, a process which involves a drill press, razor blades, and surgical precision in hopes of extending it's life once again.

Good luck, and protect your HP from cheap batteries and wrong-doers at all costs.

5-0 out of 5 stars Yardstick for Calculators
I must admit that I am loyal to HP calculators! I bought the HP35 in the early 70's when I was a graduate student at Washington University. I currently collect HP calculators.

When I bought the HP 48gII about a month ago I encounted the much talked about keyboard problem. I did what comes naturally. I called customer service. A very friendly representative took my name, address, and the model and serial number of the problem calculator. In about 30 seconds I was informed that a problem free calculator would be on the the way in 3 to 5 business days! I was also given a case number so that I could keep tabs on the progress of the shipment of the replacement. Note that I did not ask for a replacement! The company apparently is on top of the problem and know exactly which calculators need replacement. I asked about instructions for returning the problemcalculator and was told to wait for further instruction from HP. If I do not hear from HP in 30 days, I may dispose of the problem calculator as I see fit. What else could one hope for?

In four business days I received my new HP48gII with three 3AAA cells and two memory cells. The calculator only reguires one memory cell. I immediately checked out the calculator. My problem calculator would ocassionally not respond to the pressing of the up/down and left/right keys. At times others would not respond. With the new calculator I have not experienced any problems.

Go on. Stop listening to the foolishness. Get the best calculator out there. Get the HP48gII!

5-0 out of 5 stars H(P)ope Springs Eternal
Hughey-Pack is baaack!(Okay, tone it down a bit.)No, I really like the new 48gII, although I can't figure why they chose to ID it in the 48 series, since it clearly is a derated 49g+, itself a nice update of the original 49g. I guess 49g- didn't sound too upbeat.And why the serial port when the 49g+ has USB? My laptop doesn't have serial, so I'll have to front thirty for a USB serial converter anyhow. So, in retro, I should have sprung the extra forty dollars for a 49g+, and I've answered my own question. But this clearly brings HP back in line with the TI89. I bought an 89 last spring at Wallyworld for sixty dollars unopened (I guess they were clearing them out for the Titaniums: even so, my fellow engineers called me "traitor", but, hey, sixty!) I was impressed by the Derive CAS and the overall physical quality. Compared with my 49g, it symbolically integrated ordinary expressions quite fast. The 48gII puts HP back in this league, with the (I'm guessing) Erable CAS and 48 MHz CPU.TI quality has improved markedly in the last few years (it had a long way to go) and HP's has slipped some, but the HP48gII seems solid, although it just doesn't have the heft and feel of my fourteen year old 48SX (which still works perfectly with Sparcom Calculus card and all.)No keyboard problems so far, but then no display problems with my TI89 so far either , just waiting for the shoe to drop.

Products like this are what keep HP a quasi-religion for most engineers: my original HP35 , thirty two years old, still works sans battery pack, although watching it canoodle for a full second to extract the sine of PI/6 is amusing, we've come a long way. I always thought HP should have marketed a version of the HP95 palmtop with MathCad or TK Solver in ROM forscientific/engineering folks.And Carly should take a look at the Qonos on, and maybe goose the ACO: tech types would line up like Matrix first-nighters, four hundred in hand, for something like this with the HP sticker.

3-0 out of 5 stars Hope they've fixed the keyboard (updated Oct 04)
I bought this calculator a few months ago.Used to use a 42s, as well as 32 versions.I haven't had any trouble adapting to the new enter-key location, and after spending some time studying this more complicated computing device, I sort of like many of the features.However, the keyboard on mine is unacceptable.As others have commented (both here and on the page for the 49g+), the keys will sometimes miss the keystroke.I find this totally unacceptable, and I, like others lament the decline of quality in HP (at least in the calculator arena).But, I'm hooked on RPN and TI doesn't have it.I plan to try to return my 48gii to HP and see if they have actually fixed the problem (some reviews of the 49+ look hopeful in this regard).If you have a newer model and the keyboard works perfectly (which it should), please post here so we can once again get people buying HP calculators!It will do us all good ;-)***OK - I called HP support.They were very nice and sent me a new calculator.The calculator had an earlier serial than the one I already had - so I wasn't hopeful, despite what they told me.Sure enough, it acted about the same.HOWEVER:1)This was a couple of months ago, so it is possible manufacturing has improved in the mean time.2) I have found a good workaround:Turn on the keystroke beep sound.It's not too loud, does not bother me, and most important, it is very obvious now when it misses a keystroke.I don't have to look at the display - which slows down work.Instead, my senses detect the missing beep without even thinking and I then just hit the key again.I strongly recommend this for anyone with an existing calculator with the problem - and am hopeful based on some recent reviews that HP may finally have fixed the issue on the latest ones being produced... ... Read more

14. HP 48G Graphing Calculator
by Hewlett Packard
list price: $89.99
(price subject to change: see help)
Asin: B00000JBLL
Catlog: CE
Manufacturer: Hewlett Packard
Sales Rank: 19744
Average Customer Review: 5.0 out of 5 stars
US | Canada | United Kingdom | Germany | France | Japan Product Description

Now the power of 3-D graphing, charts, and lists are in an RPN graphic calculator. The HP 48G helps you work through complicated equations quickly and easily. Use the pre-created forms to input your data fast. The HP 48G gives you the functionality of a high-powered graphic calculator in an easy-to-use system. ... Read more


  • 32 KB of RAM
  • Built-in equation library
  • 300+ Formulas/Scientific constants
  • Create applications quickly and easily
  • Statistic/Mathematic/Scientific features

Reviews (10)

5-0 out of 5 stars Fine craftsmanship!!!
HP calculators are built to be used by professionals.They are built to a standard of quality you seldom see anymore.Unlike calculators from other manufacturers, people who use HP calculators tend to use them for a VERY long time!I have had my HP48g for 8 years now and it still measures up to the competition.YES RPN entry is different BUT it is FAR MORE efficient to use in lengthy or repetitve computations. Unlike Casio,Sharp, and TI, there is a tremendous amount of professional grade software for scientist and engineers widely available.There are games too. The HP48g is solid and it has an IR port as well as a serial port for connection to a computer or other device.This calculator is a powerhouse!If you are a science or engineering major and you want to be serious about your trade then this has to be a device you own!

5-0 out of 5 stars Can't imagine being without it
I've had this calculator for 7 years now and am very satisfied.Once you get used to the stack system of inputting, you wonder how you ever did without it.I'd recommend it to anyone entering the engineering field, either school level or professional.

5-0 out of 5 stars HP Calc Review
I bought a HP48S in 1993.Even though I was an extremely poor Engineering student at the time, I found it to be money well-spent.The equation solving capabilities of the HP proved to be essential in getting me through tough engineering exams.I liked the 48S so much that Irecently bought the HP48GX, and it has proven to be even better than the48S in many ways.I would recommend this calculator over any other brandon the market to an Engineering student or graduate.

5-0 out of 5 stars Think hard before buying this calculator.
I am an Engineering student in Hoboken. I recently purchased an HP48GX. I would not advise buying this calculator for simple user functions. The stack system is no good. To do simple functions like 4 * 4 + 5, so manysteps have to be taken. But on the other hand I would recomend thiscalculator for the serious engineering student, it will get you far. Buy anHP but also buy a minor scientific calculator so that you can perform themore simple operations. Choose wiseley, the HP is not a calculator you jumpinto buying without trying it out.

4-0 out of 5 stars A Must for Engineers and Scientists
A great calclator that can handle just about any calculation, however, the manuals are rather onerous.As an engineer, I would buy the 48G again.You must and use and like RPN! ... Read more

15. Casio ClassPad 300 Touch-Screen Graphing Scientific Calculator
by Casio Inc.
list price: $179.95
our price: $142.49
(price subject to change: see help)
Asin: B0002AUVP2
Catlog: CE
Manufacturer: Casio Inc.
Sales Rank: 17917
Average Customer Review: 4.0 out of 5 stars
US | Canada | United Kingdom | Germany | France | Japan

Product Description

MODEL- CLASSPAD300VENDOR- Casio CalculatorsFEATURES- ClassPad300 Pen-based Graphing CalculatorThe ClassPad 300 comes packed with an impressive collection ofapplications that support self-study, like 3D Graphing, Geometry,eActivity and lots more. A big 160x240 pixel LCD touch screenenables easy and intuitive stylus-based operation. Uses an intuitive pull-down menu interface that simplifies evencomplex operations. Solutions, expressions and other items can beselected with the tap of the stylus. Supports drag and drop, copy and paste and other pen-based operations that help minimize keyoperations. Versatile graphing tools for 3D graphing and drawing of geometric figures, which provides plenty of support for the mathstudies of students.Presentation application provides the teachers with tools forcreating materials to promote student understanding of mathematicalconcepts and problem solving processes. eActivity applicationallows the creation of eActivities that can include figures,expressions and explanations. * Pen Touch operation-Computer-like intuitive operations for menuselection, button operations, etc. Drag & Drop supports dragging of aninput expression to a graph screen for instant graphing. * CAS (Computer Algebra Systems) - Natural display input enables input of fractions, differentials, integrals, Sum calculations, lim calculations, and other expressions in the same format as that used in mathematics texts. - Function Conversion function - Algebra assistant* eActivity Application - Creation - Buttons for expression processing, text statements and eActivityfunction recall. - Each teacher can create activities on his or her own calculator. - Button for recalling user-created programs - Application & Classroom - ... Read more


  • 160-by-120-pixel display with iconic menu interface
  • Lets you enter equations using traditional textbook format
  • Pen Touch operation, including drag-and-drop
  • 3-D graphing trace, zoom, rotate functions
  • Expression processing, text statements, and eActivity functions

Reviews (7)

This calculator is amazing! It does everything the Texas Instruments ones do and even much better! It's very easy to use. Drag and drop. I think this should be the standard for the next generation calculators. The battery lasts forever! I don't see any problem with the LCD screen at all. It's CRYSTAL clear even under below average light conditions. Even my younger brother in elementary school has no problems using it at all! I bought one for myself and another for my fiance!

1-0 out of 5 stars Yes, It is true. The display is awful.
I totally agree with the previous reviewer. I removed the protective cover (as suggested by another reviewer), it did not help that much. The only way I can see the screen is when I place the calculator under a desktop lamp.
I wasted $150. What a shame.

1-0 out of 5 stars Unusable LCD Display
The LCD diplay on these units (I have purchased two, now, with the identical problem) is so bad that the units are essentially unusable. The LCD display contrast is very, very low. (it is hard to believe that the contrast is even 10:1? (a good LCD computer monitor is about 500:1))

Even under the best lighting conditions, carefully holding the instrument just so, etc. the units are hardly even readable. I have 1) replaced the batteries (both the batteries that came with the units and these replacement batteries tested fully charged) 2) carefully adjusted the contrast (being unusable is the BEST that I could get, any other contrast is hopelelly worse) 3) reset the unit, etc.

After the problem with the first unit, I looked at the reviews and the reviews did not mention this problem. I therefore, reasonably, assumed that this first unit was defective and so I arranged to exchange it for another one. Unfortunately, the second unit's display is equally abominable so I assume that this very unfortunate defect is intrinsic to the product.

5-0 out of 5 stars Awesome
Of all the calculators I've ever used, the moment i picked up the classpad I knew it was different from all the rest.With quite a few more functions than standard graphing calculators on the market, and helpful programs such as the equation solver, the Classpad, with its state-of-the-art technology and easy to use touchpad screen will blow anyone who uses it away.

5-0 out of 5 stars A Quantum Leap in Calculator Technology
Would you use your computer without a mouse?Would you use a PDA without a pen?If so - buy a traditional graphing calculator.If not, buy ClassPad.

I have tried to use the CAS features of high end calculators: TI 89, Casio FX 2.0 to solve real algebra problems in my work as a software engineer, but was always frustrated by the difficulty of inputting expressions.The ClassPad solves that, by its natural math input (think Word's Equation Editor).

The only small fly in the ointment is the screen display - because of the need to have good battery life (and for someone used to PDA's perpetually running out of juice, ClassPad is excellent in this regard) Casio have not back lit the display, and in low lighting conditions, it can be a little dim.However, removing the protective cover helped enormously, and I'd risk a little eyestrain for the joy of using this little beauty. ... Read more

16. Texas Instruments TI-85 Advanced Graphing Scientific Calculator
by Texas Instruments

Asin: B00005QT8A
Catlog: CE
Manufacturer: Texas Instruments
Sales Rank: 5976
Average Customer Review: 4.5 out of 5 stars
US | Canada | United Kingdom | Germany | France | Japan Product Description

Designed with students of higher math in mind, the TI-85 is a scientific calculator that offers a wealth of features and functions that will take you smoothly from pre-algebra all the way through college calculus. Its data I/O port and unit-to-unit link (compatible with all TI-85 and TI-86 models) allow you to easily transfer your final graphs and equations among systems, while the 28K RAM and customizable menu keys provide quick access to necessary programming functions. As you advance through classes, simply reprogram the keys to keep up with your new textbook chapters.

Functions are widely varied, and include the ability to solve for systems-of-equations, polynomial-root, or any variable in an equation. Graphing possibilities include parametric equations, polar equations, and solutions to differential equations. Statistical analysis runs the gamut from linear, logarithmic, exponential and power to quadratic polynomial, cubic polynomial, and quartic polynomial regressions. In addition, data is viewable as strings, pictures, or vectors. Simultaneous separate graph capability and 15 interactive zoom features are also included.

The display is a generous eight lines long and 21 characters wide; this unit is powered by four AAA batteries, with a dependable long-life lithium ion providing memory backup. Texas Instruments includes a one-year warranty covering parts and service.

What's in the Box
TI-85, lithium backup battery, link cable, guidebook with warranty card, and impact-resistant slide case; AAA batteries not included ... Read more


  • Up to 99 graphing functions defined, saved, graphed, and simultaneously analyzed
  • Easy-to-read 8-line by 21-character display
  • Link capabilities for data transfer through I/O port
  • Powered by 4 standard AAA batteries with a lithium battery backup
  • Guidebook, unit-to-unit link cable, case, 1-year warranty

Reviews (4)

4-0 out of 5 stars replaced my TI-30 Stat
I used a scientic calulator for years. I bought the TI-85 my Senioryear of High School and even though I'm not yet in college (five years later) I'm still a nerd that likes to play on it. most of time I just use it for basic stuff I can still do with a new TI-30X I bought granted I can graph with it and I've been looking hard at TI-89 for no other reason than I can. (more than likely would be my next purchase if I did buy another one) the sad thing is resources for this calulator are limited seeing as it's been discontinued but you know it's still more powerful with it's computing power over my GF TI-83 plus. it just lacks the storage of memory.

5-0 out of 5 stars Excellent Investment..
Its an excellent investment for engineers. The Calci helps a lot in mathematical calculations. It has a Huge number of engineering applications. Few applications which I found VERY Useful are

(1) Inverse of a Matrix (2) Solving Quadratic and higher order Equations. (3) Plotting the graph of Algebric Equations which help in finding out the Maxima and Minina..

A Graduate Student

4-0 out of 5 stars TI - 85 Overall, a good graphing calculator.
With a large number of features and a huge range of functions, the TI-85 is a graphing tool that is well worth its cost.It is fully programmable, using a BASIC-like programming language.Texas Instruments discontinued this line of calculators however, and though they may have had their own reasons, I know of at least two flaws with this particular calculator.The first is that there are some bugs in its programming, such as its inability to convert negative temperatures.The second and much more serious problem is that the screen is not reliable.Roughly half of these calculators have one or more lines or columns of pixels fail after a few years of use.As long as you aren't paying retail price, however, the $$$it might cost for a used TI-85 is more than worth it.Enjoy.

5-0 out of 5 stars Awesome!
This product is great!The ability to program different into it lets you have the ability to make movies or games.I think that without it, you might not pass through long car trips completely satisfied.This is one of the greatest calculators ever.You should buy it today! ... Read more

17. Texas Instruments TI-82 Graphing Calculator
by Texas Instruments

(price subject to change: see help)
Asin: B00005QT8B
Catlog: CE
Manufacturer: Texas Instruments
Sales Rank: 11123
Average Customer Review: 4.5 out of 5 stars
US | Canada | United Kingdom | Germany | France | Japan

Product Description

Texas Instruments Graphing Calculator Ti82 ... Read more


  • 1-year warranty
  • Graphing calculator for math and science work
  • Computer connectivity enabled
  • Programming and data collection
  • 8-line by 16-character display

Reviews (3)

4-0 out of 5 stars TI-82 vs. Other TIs
TI-82 Is great, I think!?!?? Am returning to college after 30 years. Decided to start with basic mathmatics. Will do Intro to Algebra next semester. On to a Math degree. I am preparing an alternate career to the one I am employed in. I am anticipating a lay off. Thought I would try teaching . . . Math! Anyway, can anyone tell me will the TI-82 do ok for Algebra? Then I could use my money to buy a TI 200 or 92 or 89. Use at home if I can't in class/tests. And . . . I inherited a TI-82. Long story. Please email:

5-0 out of 5 stars Fabulous Deal!
I missed the current sale of this particular calculator so my only option was to go online.I found this one for a super low price and received it merely a few days great condition.It does every function it was meant to do and is easy to use!

4-0 out of 5 stars Easy To Use
This is a great TI calculator expecialy for Pre-Algebra/Algebra students. You can do long math equasions with the press of a button. You can load cool programs on it that help you do lots of math functions, or play games. ... Read more

18. Texas Instruments Graph-Link Serial Cable for Windows
by Texas Instruments
list price: $19.99
our price: $18.99
(price subject to change: see help)
Asin: B000051SHR
Catlog: CE
Manufacturer: Texas Instruments
Sales Rank: 6104
Average Customer Review: 4.0 out of 5 stars
US | Canada | United Kingdom | Germany | France | Japan Product Description

Designed to support and enhance the functionality of Texas Instruments graphing calculators, the TI-Graph Link for Windows connects your calculator to your computer. This unit-to-unit cable with a serial port lets you install calculator software and download data directly from the Web.

Use the TI-Graph Link to create and edit programs right on your screen while still having all your usual calculator functions. The program protection feature allows you to prevent editing after a program has been loaded onto your calculator. You can transfer both screen shots and files from your computer to your calculator. You can also store your calculator's programs and data on your computer or make backups of your graphing calculator's memory.

The TI-Graph Link for Windows supports Windows 95, 98, and NT 4.0; supports EGA, VGA, XGA, and SVGA video adapters; and supports 3.5-inch floppies, CD-ROMs, or an Internet connection. For Windows 95/98 users, an 8 MB RAM module is available; and for NT 4.0 users, a 16 MB RAM module is available. Included with the cable is a CD-ROM with software and a guidebook. The TI-Graph Link for Windows comes in black and is compatible with the TI-73, TI-83, TI-83 Plus, TI-86, TI-89, TI-92, TI-92 Plus, and other models that may be available in the future.

Note: Mac users see TI Graph Link Serial Cable for Windows and Mac. ... Read more


  • Includes unit-to-unit cable and software
  • Provides an interface between your calculator and PC
  • Extends and simplifies the functionality of your TI calculator
  • Ideal for software downloads and backups
  • Compatible with Texas Instruments graphing calculators

Reviews (19)

5-0 out of 5 stars A must-have for all TI Calculator Graphing Calculators
This is a must have for all Texas Instruments Graphing Calculators. I like adding games to my calculator to use when I am bored. This is a must-have so that you can add cool stuff to your calculator. You can download great games from

5-0 out of 5 stars TI LINK

5-0 out of 5 stars A must have
This is a must have. You are able to put very useful programs for ur school courses on it. also, there are very numerous websites that u just download it onto ur calculator.

5-0 out of 5 stars Works great with XP with the right software.
If you have trouble getting the TI Connect software to work with Windows XP, try the freeware program TiLP instead, available from the website. It's compatible with all versions of Windows, as well as many other operating systems, and with all TI Graphing calculators. The Graph Link is indispensable for getting the most of your TI calculator, not to mention allowing you to play games on it!

2-0 out of 5 stars XP Users Beware
I recently bought this thinking I could use it to upgrade my TI-86 calculator. To my surprise I heard it was incompatible with XP. I supposed the worst that could happen is that it wouldn't work. As soon as I recieved the Cable it said to go to the I went and updated the software specific to my calculator. After the installation it asked me to restart. After the restart I immediatly recieved a Blue Screen of death and luckily windows XP found out it corrupted a file in the registry and fixed it but were it not for that I would have to do a format. I have not fully installed it yet as now I have started backing up everything as a just in case scenerio however i warn users that when buying this product be cautious as this is not 100% XP compatible and may mess up your system. ... Read more

19. Texas Instruments TI-81 Graphing Calculator
by Texas Instruments

Asin: B00005QT8C
Catlog: CE
Manufacturer: Texas Instruments
Sales Rank: 24568
Average Customer Review: 3.5 out of 5 stars
US | Canada | United Kingdom | Germany | France | Japan


  • Easy-to-use keyboard layout; protective slide case
  • Large and easy to read 8-line by 16-character display
  • Graphs up to 4 functions and 3 parametric equations
  • Easy-to-use display menus with advanced functions
  • 2.4K byte memory stores up to 37 programs

Reviews (2)

2-0 out of 5 stars TI-81
If you need a graphing calculator for a calculas class this may do the trick but I recommend the TI-82r a higher model. This calculator did not have the features needed for my college class but it may be ok for a high school class. See what features you need and then buy it. The only good thing about it was you cant beat the price.

5-0 out of 5 stars I Really Good Bargain!
This graphing calculator is an outstanding bargain for the features that it possesses. The ability to perform so many mathematical tasks is always an added plus. I would highly recommend the purchase of this highly reasonally piece of electronic equipment1 ... Read more

20. Sharp EL-2630PIII Deluxe Heavy Duty Color Printing Calculator with Clock and Calendar
by Sharp
list price: $79.99
our price: $64.59
(price subject to change: see help)
Asin: B00005BIEH
Catlog: CE
Manufacturer: Sharp
Sales Rank: 10427
US | Canada | United Kingdom | Germany | France | Japan Product Description

The Sharp EL-2630 printing calculator is an indispensable tool for both home and office. The EL-2630 displays an extra-large 12-digit LCD display for better viewing, and two-color ribbon printing (positive numbers in black, negative numbers in red) is enabled at about 4.8 lines per second on standard paper rolls.

The EL-2630 has four-key memory (memory plus, memory minus, and recall/clear) and special functions keys including grand total, adding mode, constant, double zero key, mark-up/profit-margin key, item counter, and rounding settings. Decimal settings are adjustable from floating to fixed decimal places (6-3-2-1-0). A calendar/clock function displays and prints the date and time.

What's in the Box
Calculator, power cord/AC adapter, two-color ink roller, paper roll, instruction manual, service information ... Read more


  • Uses standard paper roll
  • Extra-large 12-digit display with punctuation
  • Quiet ribbon printing in black and red
  • 4-key memory, grand total, average, mark-up functions
  • Calendar/clock function displays and prints date and time

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