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Rare IBM Schools Computer 1969

I found this interesting and rare computer with a strange keyboard. I think a replica Is there anywhere a manual?

i did manage to collect documents about the machine, there was the original quick reference sheet, and a paper about the unit that describes it’s architecture in detail was fairly easy to find. There’s some mention on the internet of mathematical investigations that some school pupils undertook using the machine, so it did move from being a teaching aid into being a useful tool, well, to a small extent. an analogue computer built from electronic components by the patient effort of five Remove boys over a period of nearly a year, which became operational only a few days before the Fair.

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