I would suggest you might like to look at the following pages about a machine that was built at Harwell in the UK in the late 1940s / early 1950s. http://www.computerconservationsociety.org/witch.htm Kevin Murrell Computer Conservation Society 07939 471765 2009/11/15 Evan Koblentz <evan@snarc.net>:
While writing about the National Bureau of Standards' SEAC tonight, I began to wonder: what are some other examples of computers in the late 1940s and early 1950s that were developed by customers because it was easier than buying one commercially? I'm specifically interested in machines that were completed and put into real-world use, not those which were experiments.
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