TI-59 / TI-58 - Wikipedia

Texas Instruments - Wikipedia

My dad's 1977 Texas Instruments TI Programmable 58 calculator. : r/vintagecomputing

TI-59 / TI-58 - Wikipedia

Texas TI 59 programmable calculator

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TI-59 – Wikipedia

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My dad's 1977 Texas Instruments TI Programmable 58 calculator. : r/vintagecomputing