Sinclair Executive Memory
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The Sinclair Executive Memory is a four-function calculator introduced by Sinclair Radionics in 1973. It uses eight red LED digit displays and is powered by four button cell batteries. The low power consumption required to run off such a small power source was obtained by pulsing the power supply to the electronics.
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This exhibit has a reference ID of CH41933. Please quote this reference ID in any communication with the Centre for Computing History.