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Introduction to programming, TI Programmable 57 by Texas Instruments [1977] {510.28542--oclc} : Texas Instruments : Free Download, Borrow, and Streaming : Internet Archive
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TI-57 - Wikipedia
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Dr. Monk's DIY Electronics Blog: TI Programmable 57 Calculator Battery Conversion
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MyCalcDB : Calculator Texas Instruments TI Programmable 57 aka TI-57
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Texas Instruments TI-57 - My very first programmable calculator (1980) | Calculator, Computer history, Pocket calculators
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TI-57 - Wikipedia
TI-57 Programmable Calculator | PCjs Machines
DATAMATH
Virtual Museum of Calculators
Texas Instruments Programmable 57 Handheld Electronic Calculator | National Museum of American History
