Chadless keypunch

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(hardware)

Chadless keypunch - A card punch which cut little U-shapes in punched cards, rather than punching out a circle or rectangle. The U's made a hole when folded back.

One of the Jargon File's correspondents believed that the term "chad" derived from the Chadless keypunch. Obviously, if the Chadless keypunch didn't make them, then the stuff that other keypunches made had to be "chad". The assertion that the keypunch was named after its inventor is not supported by any record in US or UK patents or surname references.

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Chactas
Chad
chad box
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Chadband, Rev.
Chadderton
Chadds Ford

Chadless keypunch
Chadwick, Florence May
Chadwick, George Whitefield
Chadwick, Henry
Chadwick, Lynn
Chadwick, Sir Edwin
Chadwick, Sir James
Chaeronea

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