INTRODUCTION
Texas Instruments' graphing calculators are very popular among students in
high school, junior high school, and college. This is especially true in the
United States, where they are practically the standard for math courses in the
higher grades. TI's models range from inexpensive calculators with basic
functionality to sophisticated calculators suitable for use throughout
collegelevel math courses and beyond.
Playing a large part in their popularity is the fact that TI's graphing
calculators can be programmed in a language closely resembling BASIC and, in
many cases, in lowlevel assembly language. On calculators with link ports,
these programs can be copied to other calculators of the same type. Many
students learn to program on these calculators and eventually move up to
computer programming.
Each available model has a different combination of capabilities, memory
capacity, programmability, and price. See below for descriptions of each
individual calculator.
CURRENT MODELS
Click on a model's name for a picture and detailed information on that
calculator.
» TI84 Plus C Silver Edition
(2013)
The TI84 Plus C Silver Edition is based on the original TI84 Plus Silver Edition, with a new backlit color display added and software enhancements to take advantage of it, such as highlighting different functions on a graph in different colors for easier comprehension. It also replaces the conventional AAA cells with a rechargeable battery pack.
» TINspire CX & TINspire CX CAS
(2011)
The TINspire CX is the most recent evolutionary step. Almost resembling a smartphone, it is the first TI calculator to sport a backlit, color LCD, as well as featuring a removable WiFi module and a rechargeable lithiumion battery. RAM and storage memory are increased to 64 MB and 100 MB, respectively. The CX no longer features TI84 Plus keypad support, but it otherwise maintains the features of the earlier Nspire models.
» TINspire
(2007)
The TINspire is a significant departure from previous graphing calculators with its grayscale screen and PDAlike appearance. It uses an ARM processor and features 16 MB of RAM and 20 MB of storage space. With the exception of a TI84 Plus emulation mode, is not compatible with any of TI's previous calculators. When originally released, it completely lacked programming capability. This was incrementally improved with new OS revisions over the next few years, and currently, development in TIBASIC, Lua, and ASM/C is possible.
» TINspire CAS
(2007)
The TINspire CAS is the brother of the TINspire. It is intended to be TI's new flagship
graphing calculator with all of the features of the TINspire plus the inclusion of a
Computer Algebra System. Unlike the TINspire, the Nspire CAS does not support the TI84
Plus keypad and so no backwards compatibility exists with the 84 Plus.
» TI89 Titanium
(2004)
The TI89 Titanium includes all the builtin functionality and power of the original
TI89. It has an increased amount of Flash ROM which is now equal to that of the Voyage 200 except the TI89 Titanium is in a traditional handheld design. Along with the Voyage 200, it is TI's most sophisticated calculator, with such features as 3D graphing, upgradable flash ROM, builtin assembly language programming, and a generous amount of useravailable memory. It now includes a mini USB port in addition to the standard I/O port.
» TI84 Plus Silver Edition
(2004)
The TI84 Plus Silver Edition is the successor to the TI83 Plus Silver Edition. Its new
features
include a new builtin clock and a new mini USB link port in addition to the standard I/O
port. The TI84 Plus SE was the first calculator made by TI to include their new interchangeable faceplates and a kickstand, both of which add to the overall latest stylistic design from TI.
» TI84 Plus
(2004)
The TI84 Plus is an upgrade to the TI83 Plus. It remains completely compatible with
the TI83 Plus. Its features include a new builtin clock, a new mini USB link port
in addition to the standard I/O port, added clock speed over the TI83 Plus
and an increase in Flash ROM size. The TI84 Plus has a newly designed case.
» Voyage 200 PLT
(2002)
The Voyage 200 PLT was the most advanced calculator Texas Instruments made prior to the introduction of the TINspire. It keeps all of
the qualities of the 92+ while increasing the amount of Flash ROM to 2.7 MB. It also
comes in the latest stylistic case from TI.
» TI83 Plus
(1999)
The TI83 Plus is nearly identical to the TI83, maintaining backward
compatibility but greatly increasing available memory and allowing for
flashupgradable ROM and commercial calculatorbased applications. This model is the "base model" of the highly popular 83/84 Plus series.
» TI73 & TI73 Explorer
(1998)
The TI73, like the older TI80, is designed for middle school classes, but
features flashupgradable ROM like the rest of TI's newest calculators. It
also improves upon the TI80 with additional statistics functions and a link
port for transferring programs and other data.
DISCONTINUED MODELS
Click on a model's name for a picture and detailed information on that
calculator.
» TI83 Plus Silver Edition
(2001)
The TI83 Plus SE is nearly identical to the TI83 Plus, maintaining backwards compatibility but greatly increasing available memory. Like the 83 Plus, it allows for flashupgradable ROM and calculatorbased applications. It was the most popular among Texas Instruments Z80 calculators, but TI has now discontinued it in favor of the TI84 Plus and TI84 Plus Silver Edition.
» TI92 Plus
(1998, 1999)
The TI92 Plus was available as both a standalone calculator and a module
upgrade to the TI92. It added additional memory, flashupgradable ROM, and
advanced mathematics software. A TI92 Plus is functionally almost identical
to a TI89. The Voyage 200 has since replaced the TI92 Plus, since it offers additional features.
» TI89
(1998)
The TI89 sported all of the power of a TI92 Plus, but in a traditional
handheld design. Along with the TI92 Plus and Voyage 200 it was one of TI's most sophisticated
calculators, with such features as 3D graphing, upgradable flash ROM, builtin
assembly language programming, and a generous amount of useravailable memory. The TI89 Titanium has since replaced this model.
» TI86
(1997)
Just as the TI83 succeeded the TI82, the TI86 followed up on the TI85's
advanced functionality while adding a stylish new case, assembly support
similar to that of the TI83, and greater memory capacity, while still
maintaining compatibility with TI85 programs.
» TI83
(1996)
The TI83 was released as the successor to the TI82 and featured a newer,
more contoured case design that has since been used on all of TI's newer
calculators. The TI83 features backwards compatibility with TI82 programs
and some newer financial functions, but by far the most notable aspect of this
calculator is builtin assembly programming capability supported by TI
itself. This advance saved curious programmers the trouble of "hacking" the
calculator themselves to achieve this functionality, and marked the beginning
of TI's embracement of assembly programming. The TI83 was a popular programming platform, but has now been replaced by the TI83 Plus, an updated model.
» TI92
(1995)
When it was released, the TI92 was a huge departure from TI's previous
graphing calculators. It is held horizontally and has a larger display,
computerstyle QWERTY keyboard, graphical user interface, 3D graphing
features, and a Motorola 68000 processor (previous TI calculators relied on
slower Z80 processors). Programmers were anxious to make use of the TI92 for
efficient assembly programming, and a loophole was eventually discovered to
make this possible. As a result, many impressive games and programs are now
available for the TI92. Unfortunately the TI92 is rarely used nowadays, having been replaced by the TI92 Plus (and later the Voyage 200).
» TI80
(1995)
The TI80 was released with Algebra I and middle school students in mind. Like
the TI81, it has no link port and is not intended for serious programming.
The TI80's newer cousin, the TI73, sports flash upgradability and more
memory, and has completely replaced the TI80 in everyday use.
» TI82
(1993)
The TI82 was released as a more userfriendly version of the TI85, at the
sacrifice of many of its advanced features, but with a lower price tag. It
was long believed that the TI82 could not be programmed in assembly, but, as
with the TI85, a loophole was eventually found, making the TI82 a much more
attractive programming platform. The TI83 Plus and TI84 Plus have taken the place
of the TI82 as the standard in math and science classrooms and the TI82 has been discontinued.
» TI85
(1992)
The TI85 was designed as a powerful engineering and calculus calculator. It
was the first TI calculator to have a link port and assembly programming
capability (through an unintentional loophole). It has since been eclipsed by
the TI86, which features TI85 compatibility along with more advanced
features.
» TI81
(1990)
The TI81, TI's first graphing calculator, was designed for algebra and
precalculus. It has since been replaced by newer models which have faster
processors, more memory, and popular features such as linking capability and
flash upgradability. The TI81 drew little in the way of thirdparty games
and other programs, since the code must be typed into the calculator by hand.
CHOOSING WHICH MODEL TO BUY
There's a wide variety of TI graphing calculator models you can choose from 
which is right for you? Texas Instruments tends to create calculator models
for a target area of students in certain grade levels. See below for an
overview of who will benefit the most from each currently offered model.
 The TI73 is intended for middle school students
in basic algebra classes. It performs many basic arithmetic and graphing
functions. However, we only recommend the TI73 if price is an absolute concern and the calculator will be used only for elementary mathematics. For slightly more expense, the TI83 Plus will be a far superior buy.
 The TI83 Plus is intended for most high
school students. It has many enhanced features in addition to those of the TI82 and 83. This calculator makes an excellent first choice for the average student. The TI84 Plus has more available RAM and a faster processor than the TI83 Plus.
 The TI84 Plus and TI84 Plus SE are esentially a TI83 Plus with a few more features, including a clock, USB port, and additional speed and memory. Designed for high school students, these two calculators are for the users wanting to get as much out of their calculator as possible. If you are looking for a calculator based solely on its math capabilities, the TI83 Plus will do as much as the TI84 series will at a cheaper price. However, if you can afford the added cost of the TI84 series, it will provide a better value than the TI83 Plus.
 The TI89 Titanium and its QWERTYequipped brother, the Voyage 200 PLT, are among the most advanced Texas Instruments calculators on
the market. The Voyage 200 PLT is a TI92+ in a fancy new case with a significant increase in available Flash ROM, and is at the top of the line. If you need the utmost mathematical horsepower, pick up any of these.
 The TI89 Titanium offers largely the same mathematical capabilities as the TI89, so there is no major advantage there. However, there is much more available Flash ROM. The regular TI89 is suggested for gamers because not all of the current programs work on the Titanium, although the situation is improving. However the Titanium has several other features, including a USB port, which makes it much more friendly to the average user. The Titanium is essentially a Voyage 200 PLT but without the QWERTY keyboard. The Titanium has replaced the regular 89 for sale in many stores.
 The TINspire and TINspire CX exist as both CAS (Computer Algebra System) and nonCAS models. As of 2011, these models are still quite new and are drastically different from any prior calculators. It remains to be seen how well they are adopted. We recommend that average students stick to the other models above until the longterm success of the TINspire is proven.
With this information at your fingertips, we hope that purchasing a calculator
will be easier for you. By knowing background information on every Texas
Instruments graphing calculator you can make a more informed decision. It's
recommended to read up on the features of the calculator(s) you've got your eye
on before purchasing just to make sure you're getting what you need.
