by Wlodek Mier-Jedrzejowicz Ph.D.
|Introduced on February 1 1973, this was the
second handheld electronic calculator sold by HP, and the
first business model.
The HP-80 was introduced for financial users following the success of the HP-35 among scientific and technical users. It has the same physical design as the HP-35, and, like early HP-35s, early HP-80s do not have a model number on their label, only the words "HEWLETT-PACKARD".
The HP-80 was the first HP calculator with business functions including the command row "n i PMT PV FV" below the display. It also had date arithmetic, bond and depreciation calculations, statistics functions including E+ and E-, and control of the display mode. It had a shift key to allow 11 extra functions to be placed on shifted keys.
The ENTER key was labelled SAVE - to avoid confusing business users! It had registers designed for use for specific business and statistics functions, but it also had STO and RCL buttons which allowed the user to store and recall numbers directly to and from a separate register.
The x^y function of the
HP-35 was replaced by y^x. Thus the HP-80 introduced many
of the features which have since become standard on both
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.