TI-59 / TI-58 - Wikipedia

Texas Instruments - Wikipedia

TI-59 Home Page

The TI-59 Programmable Pocket Calculator

A history in calculators

File:TI-59 with Electr. Eng. software module, manual and plastic cards w. keyboard codes.jpg - Wikimedia Commons

TI58C, the programmable calculator!

Floor Area Ratio: Definition, Formula To Calculate, Example

TI-59

Texas Instruments - Wikipedia

ti-58 Clodoveu Davis

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Reviving Your TI-59 Calculator

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