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Rabbit hole: stumbling across two Portuguese punched cards
Look, here's the thing, I don't like mysteries that involve technology. I think I hate them because I know that some other human created the...
It took a while to answer that, but it turns out that In Es Me was a business called "Instituto de Estudos Mecanográficos" based in Lisbon in the late 1960s and early 1970s. But then I discovered someone selling a book called "Introdução aos Ordenadores" (Introduction to Computers) which was apparently distributed by In Es Me exclusively in Portugal: Note that for historical reasons sometimes the escudo is written with a three digit decimal, and because earlier on the book we're introduced to João and his colleagues I know that's the format being used.
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