TI-89 series

TI-89

A TI-89
Type	Programmable Graphing
Manufacturer	Texas Instruments
Introduced	1998
Discontinued	2004
Successor	TI-89 Titanium
Calculator
Entry mode	DAL
Display type	LCD Dot-matrix
Display size	160×100
CPU
Processor	Motorola 68000
Frequency	10, 12, or 16 MHz
Programming
User memory	256 KB RAM (188 KB user accessible)
Firmware memory	2 MB flash memory (639 KB user accessible)
Other
Power supply	4 AAA batteries, 1 CR1616 or CR1620

TI-89 Titanium

A TI-89 Titanium with Computer Algebra System
Type	Programmable Graphing
Introduced	2004
Predecessor	TI-89
Successor	TI-Nspire CAS
Calculator
Entry mode	DAL
Display type	LCD Dot-matrix
Display size	160×100
CPU
Processor	Motorola 68000
Frequency	16 MHz
Programming
User memory	256 KB RAM (188 KB user accessible)
Firmware memory	4 MB flash memory (2.7 MB user accessible)
Other
Power supply	4 AAA batteries, 1 SR44

The TI-89 and the TI-89 Titanium are graphing calculators developed by Texas Instruments (TI). They are differentiated from most other TI graphing calculators by their computer algebra system, which allows symbolic manipulation of algebraic expressions—equations can be solved in terms of variables, whereas the TI-83/84 series can only give a numeric result.

The TI-89 is a graphing calculator developed by Texas Instruments in 1998. The unit features a 160×100 pixel resolution LCD screen and a large amount of flash memory, and includes TI's Advanced Mathematics Software. The TI-89 is one of the highest model lines in TI's calculator products, along with the TI-Nspire. In the summer of 2004, the standard TI-89 was replaced by the TI-89 Titanium.

The TI-89 runs on a 16-bit microprocessor, the Motorola 68000, which nominally runs at 10, 12, or 16 MHz, depending on the calculator's hardware version. Texas Instruments has allocated 256 total kB of RAM for the unit (190 kB of which are available to the user) and 2 MB of flash memory (700 kB of which is available to the user). The RAM and Flash ROM are used to store expressions, variables, programs, tables, text files, and lists.

The TI-89 is essentially a TI-92 Plus with a limited keyboard and smaller screen. It was created partially in response to the fact that while calculators are allowed on many standardized tests, the TI-92 was considered a computer due to the QWERTY layout of its keyboard. Additionally, some people found the TI-92 unwieldy and overly large. The TI-89 is significantly smaller—about the same size as most other graphing calculators. It has a flash ROM, a feature present on the TI-92 Plus but not on the original TI-92.