Hewlett-Packard HP 97 Calculators
HP also known as Hewlett-Packard made the famous HP 97 Calculator. According to the Wikipedia "The HP-67 was a magnetic card-programmable handheld calculator, introduced by Hewlett-Packard in 1976 at an MSRP of $450. A desktop version with built-in thermal printer was sold as the HP-97 at a price of $750. Marketed as improved successors to the HP-65, the HP-67/97 were based on the technology of the "20-series" of calculators (HP-25, HP-19C etc.) introduced a year earlier. The two models are functionally equivalent, and programs on magnetic cards can be interchanged between them."
We wanted to add some nice images to the WWW for the enthusiasts out there.