Description: Sinclair Executive calculator. Clever design of its electronics to reduce the power consumption allowed the use of button cells for the first time in a hand-held calculator, and gave a very thin design which was remarkable for the time. Photograph taken by myself of a calculator in my collection.
Credit: Transferred from en.wikipedia to Commons.
Author: MaltaGC at English Wikipedia
Usage Terms: Creative Commons Attribution-Share Alike 3.0
License Link: http://creativecommons.org/licenses/by-sa/3.0/
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