Calculator, Programmable, HP-65

The HP-65 was the first magnetic card programmable handheld scientific calculator. The Hewlett Packard Corporation introduced it in 1974.

Real Engineers Use HP Calculators, 50 years ago this month Hp rolled out the very first hand-held scientific calculator called, the Hp-35

1974 HP-65 Calculator playing Lunar Lander Game!

HP-65

HP-65 - Wikipedia

Pocket Programming

Hewlett-Packard HP-55 Programmable Handheld Electronic Calculator

HP-65 Side View, The HP-65 was the first magnetic card-prog…

Hewlett-Packard HP 19C/29C Combo Programmable Calculator FW, 90DW

My own collection HP calculators and space exploration