File:Vintage Texas Instruments Model SR-10 Pocket LED Calculator, First of a Line of TI "Slide Rule" Models, Sealed Battery, Price - 149.95 USD, Circa 1972 (9304906070).jpg - Wikimedia Commons
TI CALCULATOR HISTORY
TI-81 - Texas Instruments' first graphing calculator - YouTube
DATAMATH
Texas Instrument - TI-95 PROCALC - - Texas Instrument TI95 PROCALC - Casio.ledudu.com - Casio pocket computer, calculator, game and watch library. - RETRO CALCULATOR FX PB SF LC SL HP FA