Sinclair Executive (Probable Prototype)

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The Sinclair Executive calculator was the world's first slimline pocket calculator. It was released in 1972 and cost £79.95 +VAT. It was one third the size of any of its competitors in 1972 and cost half as much.

Its small size was achieved by reducing the power input demanded by the TMS1802 chip that was used in the calculator by pulsing the current to the IC, reducing the power consumption by a factor of more than 10.

The calculator was capable of addition, subtraction, division and multiplication, and was able to store a constant.

The Sinclair Executive won a Design Council Award for Electronics in 1973.

This calculator has come from Chris Wilding who worked for Sinclair Radionics and Sinclair Electronics, and is likely to be a prototype for the range, there is no name on the machine, and is held together by tape.

Manufacturer: Sinclair Radionics
Date: 1972

Other Systems Related To Sinclair Executive (Probable Prototype):

Item Manufacturer Date
Sinclair Executive Sinclair Radionics 1972

This exhibit has a reference ID of CH66638. Please quote this reference ID in any communication with the Centre for Computing History.


Sinclair Executive (Probable Prototype)

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