The TI-89 is one of the most advanced and popular types of Texas Instruments graphing calculators.
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- TI-Chess Team One of the premier programming groups for the TI-89, specializing in games that challenge the mind.
- DoorsOS Homepage of the premier shell and GUI for assembly programs on the TI-89 and TI-92+, with screenshots.
- Francesco Pirozzi's TI Page Math and engineering programs as well as games for the TI-89.