Alace cardis apunched cardwith all holes punched (also called awhoopeecard,ventilatorcard,flyswattercard,orIBMdoily). They were mainly used as practical jokes to cause disruption incard readers.Card readers tended to jam when a lace card was inserted, as the resulting card had insufficient structural integrity to avoid buckling inside the mechanism. Card punchers could also jam trying to produce cards with all holes punched, owing to power-supply problems. When a lace card was fed through the reader, acard knifeorcard saw(a flat tool used with punched card readers and card punches) was needed to clear the jam.[1][2]
See also
editNotes
edit- This article is based in part on theJargon File,version 4.2.1, which is in the public domain.
References
edit- ^"Jargon File, v4.2.1".5 March 2000.Retrieved23 June2015.
- ^Raymond, Eric S. (1996).The New Hacker's Dictionary.Cambridge, MA: MIT Press. p. 368.ISBN0-262-18178-9.
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