The TI-89 and the TI-89 Titanium are graphing calculators developed by Texas Instruments.

In the summer of 2004, the standard TI-89 was replaced by the TI-89 Titanium.

HW1 and HW2 correspond to the original TI-89 ; HW3 and HW4 are only present in the TI-89 Titanium.

The TI-89 Titanium was released in the summer of 2004, and has largely replaced the popular classic TI-89.

The TI-89 Titanium is referred to as HW3 and uses the corresponding AMS 3. x.

The touted advantages of the TI-89 Titanium over the original TI-89 include four times the available flash memory ( with over three times as much available to the user ).

The TI-89 Titanium is essentially a Voyage 200, except it doesn't have an integrated keyboard.

The TI-89 Titanium also has a USB On-The-Go port, for connectivity to other TI-89 Titanium calculators, or to a computer ( to store programs or update the operating system ).

The Titanium also has a slightly differing case design from that of the TI-89 ( the Titanium's case design is similar to that of the TI-84 Plus ).

In some cases, only one character needs to be changed ( the ROM base on TI-89 is at 0x200000, whereas the TI-89 Titanium is at 0x800000 ) by hand or by patcher.

In many testing situations, the TI-89 and TI-89 Titanium, along with the HP-49 series, are the most powerful and function-rich graphing calculators that are permitted: the TI-92 series, with otherwise comparable features, have QWERTY keyboards that result in them being classified as computer devices rather than calculators.

* Official TI-89 Titanium page from Texas Instruments

TI-89 Titanium, capable of doing Symbolic Manipulation, Computer Algebra System ( CAS )

It has also been ported to the TI-84 + calculator and the TI-89 Titanium.

Besides increased memory over its predecessor, the TI-92 Plus also featured a sharper " black " screen, which had first appeared on the TI-89 and which eases viewing.

The calculator can also run most programs written for the TI-89 and TI-92 as well as programs specifically written for it.

The TI-89 Titanium offers exactly the same functionality in a smaller format that is also legal on the SAT test, but not the ACT test.

A version for the TI-89 graphing calculator has also been created by Paul Griffin, in TI-89 Assembly.

At the turn of the millennium, the line between a graphing calculator and a handheld computer was not always clear, as some very advanced calculators such as the TI-89, the Voyage 200 and HP-49G could differentiate and integrate functions, solve differential equations, run word processing and PIM software, and connect by wire or IR to other calculators / computers.

There are some minor compatibility issues with C and assembly programs developed for the original TI-89.

In the United States, the TI-89 is allowed by the College Board on all calculator-permitted tests, including the SAT, some SAT Subject Tests and the AP Calculus, Chemistry, and Statistics exams.

Experiments with the TI-89, 92, 92 + and Voyage 200 machines show the possibility of installing some variants of other systems such as a chopped-down variant of CP / M, an operating system which has been used for portable devices in the past.

For TI-89 programmers, ghost space starts from address 0x40000, and it is widely used to circumvent some of the protections introduced with the HW2 ( hardware version 2 ) release of the calculator.

Some graphing calculators, such as the Casio 9860 series, HP-49 series, TI-89, and TI-Nspire, or the TI-83 Plus / TI-84 Plus with the PrettyPt add-on, can perform pretty-printing.

This includes calculators such as the TI-89 series.

Because of this keyboard, it was given the status of a " computer " rather than " calculator " by American testing facilities and cannot be used on tests such as the SAT or AP Exams while the similar TI-89 can be.

The TI-89 is one of the highest model lines in TI's calculator products, along with the TI-Nspire.

The TI-89 is essentially a TI-92 Plus with a limited keyboard and smaller screen.

This, along with its successors ( including the TI-89 series and the newer TI-Nspire CAS released in 2007 ) featured a reasonably capable and inexpensive hand-held computer algebra system.

TI offers a CAS on the TI-89, TI-Nspire CAS and TI-92 series models with the TI-92 series featuring a QWERTY keypad.

The TI-92 was then replaced by the TI-92 Plus, which was essentially a TI-89 with the larger QWERTY keyboard design of the TI-92.

The TI-89 is significantly smaller — about the same size as most other graphing calculators.

The TI-81 is powered by a Zilog Z80 microprocessor, like those used in almost every other Texas Instruments graphing calculator ( except the TI-80, TI-89, TI-89 Titanium, TI-92, TI-92 Plus, Voyage 200 and TI-Nspire series ).

The TI-89 is a graphing calculator developed by Texas Instruments ( TI ) in 1998.

The major advantage of the TI-89 over lower-model TI calculators is its built-in computer algebra system, or CAS.

Other TI graphing calculators have been designed to be appropriate for calculus, namely the TI-85, TI-86, TI-89 series, and TI-92 series ( TI-92, TI-92 Plus, and Voyage 200 ).

TI-BASIC is the unofficial name of a BASIC-like language built into Texas Instruments ( TI )' s graphing calculators, including the TI-83 series, TI-84 Plus series, TI-89 series, TI-92 series ( including Voyage 200 ), TI-73, and TI-Nspire.

Texas Instruments uses the 68000 in its high-end graphing calculators, the TI-89 and TI-92 series and Voyage 200.

The TI-89 is directly programmable in a language called TI-BASIC, TI's derivative of BASIC for calculators.

The 68000 line of processors has been used in a variety of systems, from modern high-end Texas Instruments calculators ( the TI-89, TI-92, and Voyage 200 lines ) to all of the members of the Palm Pilot series that run Palm OS 1. x to 4. x ( OS 5. x is ARM-based ), and even radiation hardened versions in the critical control systems of the Space Shuttle.

* Ice Hockey 68k Port to TI-89 / Titanium, TI-92 / Plus, and Voyage 200 calculators located at ticalc. org