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  - The real first IBM PC: The (almost portable) IBM 5100 !
    01/21/19
    Most of us can't remember this "PC" (no, not an Intel PC, of course).
    But it even has elements (parts) which are similar to the first IBM PC (e.g. the power switch).
    In 1973, a prototype for programming APL was build, named SCAMP.
    IBM developed it further to the Model 5
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