Calculator, Programmable, HP-65

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

Hp Calculators: Most Up-to-Date Encyclopedia, News & Reviews

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

Vintage HP-65 LED Scientific Calculator Programmable + Manual + Case + Pac + Box

File:HP-65 Mint in Box.jpg - Wikipedia

HP-65

HP Calculator Heritage Ads 1974 - HP 65

Hewlett Packard

Vintage HP 65 LED Scientific Calculator Programmable TESTED & WORKING

Vintage HP-65 LED Scientific Calculator Programmable + Manual + Case + Pac + Box