HP Calculator Heritage HP 25 - 1975

The HP 25 Programmable Scientific Calculator was released in 1975 and followed a year leter the HP 25C Programmable Scientific Calculator. This advertisement appeared in a Technical Journal in late 1976.

Caption: Introducing the first pocket programmable that remembers your programs and data even when it´s turned off. It´s called the HP-25C and incidentally, the "C" stands for "Continuous Memory C-MOS" technology.

Hewlett-Packard Company - Corvallis Division