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 commercial fully transistorised calculator since they were all announced at about the same time in different countries - these were:
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Text & photographs copyright, except where stated otherwise, © Nigel Tout 2000-2025.
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