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Got my hands on a TI-89 Titanium today. That makes a collection of a TI nSpire CAS, Casio fx-CG50, fx-991ex and now the TI-89. : r/calculators

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TI-89 Titanium Graphing Calculator | Texas Instruments

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Indestructible TI-89 | Hackaday

TI-89 Titanium Disassembly and Backlighting - Cemetech | Forum | Cemetech Labs [Topic]

TI-89 Titanium Power Button Replacement - iFixit Repair Guide

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TI-89 Titanium Disassembly and Backlighting - Cemetech | Forum | Cemetech Labs [Topic]

TI-89 series - Wikipedia

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