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jargon, printer /chad/ (Or "selvage" /sel'v*j/ (sewing and
weaving), "perf", "perfory", "snaf"). 1. The perforated
edge strips on paper for sprocket feed printers, after they
have been separated from the printed portion.
The term perf may also refer to the perforations themselves,
rather than the chad they produce when torn.
[Why "snaf"?]
2. (Or "chaff", "computer confetti", "keypunch droppings") The
confetti-like bits punched out of punched cards or papertape which collected in the chad box.
One of the Jargon File's correspondents believed that "chad"
derived from the chadless keypunch.
(1997-07-18)