Accession No

4529.182A


Brief Description

HP-35 electronic pocket calculator, in case, by Hewlett-Packard, U.S.A., 1975


Origin

U.S.A


Maker

Hewlett-Packard


Class

calculating; computer technology


Earliest Date

Jan. 1, 1975


Latest Date

Dec. 31, 1975


Inscription Date


Material

plastic; leather


Dimensions

Length 158mm; width 91mm; thickness 41mm


Special Collection

Francis Hookham Collection of Hand Held Electronic Calculators


Provenance

Donated by Francis Hookham in 1987. Donated to Francis Hookham on 13/04/1981 by individual from Peter Dann & Partners.


Inscription

[Hewlett Packard logo] “HEWLETT.PACKARD” (front of calculator, bottom)
[Hewlett Packard logo] (front of case, top)


Description Notes

Black plastic Hewlett Packard HP-35 in black leather case, with white number keys, blue and black function keys and a black on/off switch at front top left.

10-digit, plus 2-digit exponent (plus a further digit for sign and error indication), red LED display.
Rear panel has ‘Instructions’. Inside battery cover is sticker with battery details.
Case has velcro fastening at top.

Keys are short-travel, well weighted although a little heavy to the touch, make a deep, loud, clear click upon depression, and bounce back well (S Davis 28/6/2007).

Good condition.


References


Events

Description
This is HP’s first pocket calculator and the world’s first pocket scientific calculator, capable of transcendental functions like logarithms and square roots. It was called the HP-35 as it had 35 keys.

Four versions of the HP-35 were produced. It was first made in 1972 and sold for $395, with the retail price halving by the time the model was discontinued in 1975. The calculator was required to remain undamaged after being dropped from a height of 3 feet onto concrete on each of its corners. The calculator’s sloped sides were designed to make it look less thick and bulky, as the bottom edges were less visible.
01/12/2004
Created by: Ruth Horry on 01/12/2004


FM:41891

Images (Click to view full size):