TI-68 - Scientific calculator from 1989

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Texas Instrument Ti 89 Titanium Programmable Graphing Calculator (Renewed) : Office Products

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It is not just scientific, it is Advanced Scientific! Unfortunately there are display problems with this vintage TI-68 (2nd pic). It is otherwise in very nice shape. Can this sub help with tips on repair of these vulnerable ribbon connections? : r/calculators

TI-68 - Scientific calculator from 1989

TI-68 - Scientific calculator from 1989

Who Was the Inventor of the Calculator? Key Facts, Dates and Stories - Discover Walks Blog

TI58C, the programmable calculator!

Electronically upgradeable graphing calculator allows you to have the most up-to-date functionality and software applications. 16 preloaded graphing

Texas Instrument Ti 89 Titanium Programmable Graphing Calculator (Renewed)