CHADLESS KEYPUNCH
\t͡ʃˈadləs kˈiːpʌnt͡ʃ], \tʃˈadləs kˈiːpʌntʃ], \tʃ_ˈa_d_l_ə_s k_ˈiː_p_ʌ_n_tʃ]\
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A card punch which cut little U-shapes inpunched cards, rather than punching out a circle orrectangle. The U's made a hole when folded back.One of the Jargon File's correspondents believed that theterm "chad" derived from the Chadless keypunch. Obviously,if the Chadless keypunch didn't make them, then the stuff thatother keypunches made had to be "chad". The assertion thatthe keypunch was named after its inventor is not supported byany record in US or UK patents or surname references.
By Denis Howe
Word of the day
Dopamine Acetyltransferase
- An enzyme that catalyzes the of groups from acetyl-CoA to arylamines. They have wide specificity for aromatic amines, particularly serotonin, and can also catalyze acetyl transfer between arylamines without CoA. EC 2.3.1.5.
Nearby Words
- chaddock's sign
- chadian
- chadian franc
- chadic
- chadic language
- Chadless keypunch
- chadlock
- chador
- chadwick's sign
- chaenactis
- chaenomeles