Hewlett-Packard HP-35 Operating Manual

This is the operating manual for an HP-35 calculator. For the calculator, see 1991.0210.01.1.
Currently not on view
date made
Hewlett-Packard Company
place made
United States
Physical Description
paper (overall material)
overall: .4 cm x 9.5 cm x 15.3 cm; 5/32 in x 3 3/4 in x 6 1/32 in
ID Number
catalog number
accession number
Credit Line
Gift of Professor Ronald E. Zupko
See more items in
Medicine and Science: Computers
Handheld Electronic Calculators
Computers & Business Machines
Data Source
National Museum of American History


I discovered my old HP-35 calculator, a truly revolutionary calculator when I bought it for $395 in 1973, because it was shirt-pocket sized but could do complex calculations, trig, log, and exponentiation, and others over 200 orders of magnitude at a time the state of the art was four-function calculators that were 50% fatter. The HP-35 was also revolutionary in its use of Reverse Polish Notation to enable the solution of complex equations, a logical way to think but very new for the time, and it fell to this user's manual (36 small pages plus fold-out at the front) to explain how this worked, and to give many illustrated examples and carefully step through their solutions. An HP-42s simulator, a later calculator but very similar and also reverse Polish, is available as an app for (at least) iOS.

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