Greg Maletic on X: "Today's calculator: the Texas Instruments SR-22 (1973, $350). Designed for programmers, it does math in decimal, hex, or octal! https://t.co/IhHkyq9xc4" / X
![Vintage Texas Instruments Electronic Pocket Calculator With AC Adapter, Model SR-51-II, 10-Digit LED Display, Made In USA, Circa 1976 | Pocket calculators, Calculator, Sin cos tan Vintage Texas Instruments Electronic Pocket Calculator With AC Adapter, Model SR-51-II, 10-Digit LED Display, Made In USA, Circa 1976 | Pocket calculators, Calculator, Sin cos tan](https://i.pinimg.com/originals/00/be/03/00be037edcf271bee0ecccd26751d84b.jpg)
Vintage Texas Instruments Electronic Pocket Calculator With AC Adapter, Model SR-51-II, 10-Digit LED Display, Made In USA, Circa 1976 | Pocket calculators, Calculator, Sin cos tan
![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 (14592862578).jpg - Wikimedia Commons 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 (14592862578).jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/e/ea/Vintage_Texas_Instruments_Model_SR-10_Pocket_LED_Calculator%2C_First_of_a_Line_of_TI_%22Slide_Rule%22_Models%2C_Sealed_Battery%2C_Price_-_149.95_USD%2C_Circa_1972_%2814592862578%29.jpg)