Calculator Technology

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Calculator Electronics
Transistors

Germanium transistors were first used in the calculating circuits of desktop calculators in very late 1963 or early 1964; it is now very difficult to pin down the exact dates.

There are three contenders to being the first caclulator since they were all announced at about the same time in different countries - these were:

Click on a picture to go to the page with more details and photographs.

Friden EC132

Friden EC130
U.S.A.

IME 84

IME 84
Italy

Sharp Compet CS10A

Sharp Compet CS10A
Japan

A fourth very early calculator from the 1964/1965 period is the Mathatron, which is also a programmable model. There is an excellent description of this, with photographs, at Alex Knight's "The Calculator Museum - Desktop Calculator Gallery".

Vintage Calculators

© Text & photographs copyright Nigel Tout   2000-2017  except where noted otherwise.