The TI-89 is one of the most advanced and popular types of Texas Instruments graphing calculators.

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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.
TI-Chess Team
One of the premier programming groups for the TI-89, specializing in games that challenge the mind.
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Last update:
March 8, 2015 at 8:13:35 UTC
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