by Wlodek Mier-Jedrzejowicz Ph.D.
|Introduced on February 1 1975, just a month
after the HP-55, this was the seventh handheld electronic
calculator sold by HP, and the first to look different
from the original HP-35 shape.
The model number showed that it was to be the first of a new family - the "series 20" or "Woodstock" series. Its code name was "Pumpkin" - it was a small, non-programmable handheld calculator with lots of scientific functions.
Its main attractions
were its small size - which made it easier to fit in a
pocket than the "Classic" models, and
easier to use with one hand - and its low price, for
those days, of $125.
This article is part of the WMJARTS file. This file contains a series of articles written by Wlodek Mier-Jedrzejowicz and published in DATAFILE, the journal of the HPCC. The article was reproduced with permission of the author.
Copyright © Wlodek Mier-Jedrzejowicz Ph.D.