Paperclip computer - CT-650 computer trainer

These are the retro stylings of a surviving example of the Arkay (later Comspace) CT-650 computer trainer, a historic computing device designed mostly as an educational tool and build almost entirely based on the plans in a book titled How to Build a Working Digital Computer.

How To Build a Working Digital Computer, published in 1968, provided instructions and plans for constructing a working digital computer out of household parts including paper clips for switches. The book can still be accessed in digital form at Archive.org here:

via How to Build a Working Digital Computer… out of paperclips | Evil Mad Scientist Laboratories.

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