April 1, 2024
Vintage 1968 CARDIAC Cardboard Computational Aid, unused, original packaging
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From the pre-Personal Computer Era, comes this precursor to the modern computer age -- an unused like-new un-punched CARDIAC (CARDboard Illustrative Aid to Computation). Developed by Bell Telephone Laboratories' David Hagelbarger and Saul Fingerman in 1968, CARDIAC was a learning aid used by math teachers of that era to teach students how computers work. One of those teachers, my dad, saved all his educational materials, which is why this unused math tool still exists. Consisting of a die-cut cardboard "computer" and an instruction manual, it operates by means of a pencil and sliding cards. It operates in base 10 and includes a set of instructions allowing the CARDIAC user to add, subtract, and perform basic computer functions.
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