A sectioned Sinclair Executive pocket calculator, 1972.

Made:
1972 in Cambridgeshire
maker:
Sinclair Radionics Limited
inventor:
Clive Sinclair
Sinclair Executive Electronic Pocket Calculator (cutaway for exhibition). The Sinclair Executive Electronic Pocket

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Sinclair Executive Electronic Pocket Calculator (cutaway for exhibition). The Sinclair Executive Electronic Pocket
Science Museum Group Collection
© The Board of Trustees of the Science Museum

The Sinclair Executive Electronic Pocket Calculator (cutaway for exhibition) was the first electronic pocket calculator that could really fit into a pocket. Clive Sinclair (b. 1940) was able to achieve this by reducing the power input demanded by the calculator chip. The calculator was capable of addition, subtraction, division and multiplication, and was able to store a constant. It was one third the size of any of its competitors in 1972 and cost half as much.

Details

Category:
Computing & Data Processing
Object Number:
1974-503
Materials:
electronic components, metal (unknown) and plastic (unidentified)
Measurements:
overall (as displayed): 135 mm x 55 mm x 15 mm,
type:
electronic calculators
credit:
Sinclair Radionics Limited