| 释义 |
▪ I. chad
I had: see ch pron.
▪ II. chad, n.2 Telegr. and Computing.|tʃæd|
[Origin unknown.]
(A piece of) the waste material removed from punched cards or tape during punching.
1959J. W. Freebody Telegr. xi. 460/2 The small hinged discs of paper, called ‘chads’, remain attached to the body of the tape. 1968J. Blackburn Nothing but Night vii. 64 The machines..spewed out the sixty-four-row punch cards... At the base of each machine was a vacuum tube to remove the dust and the chads. 1982Computerworld 9 Aug. 59 The reader head is mounted on the front of the unit next to the chad box.
Hence ˈchadless a., not producing or accompanied by chads.
1959J. W. Freebody Telegr. xi. 460/2 In order..that the printed characters are completely legible, the tape is perforated by the chadless method. 1971Gloss. Electrotechnical, Power Terms (B.S.I.) iii. iii. 19 Chadless perforation. 1984U.S. Patent 4,425,394 1 Each tag has a chadless hole provided by a pattern of knife cuts.
▪ III. chad
var. of shad, a fish. |