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The TI-57 from Texas-Instruments | The Texas Instruments TI-57 Programmable was released in 1977 . It quickly became cult, sold by hundreds of thousands units. Yet it is a very limited... | By PockemulFacebook
Texas Instruments TI Programmable 57 Calculator with Case & AC Adapter, Working | eBay
Texas Instruments TI 57 Programmable Calculator 9V Battery Back by Some_Guy | Download free STL model | Printables.com
Introduction to programming, TI Programmable 57 by Texas Instruments [1977] {510.28542--oclc} : Texas Instruments : Free Download, Borrow, and Streaming : Internet Archive