Keypunch

（重定向自Key puncher）

Keypunch operators at work at the U.S. Social Security Administration in the 1940s.

Hollerith's Keyboard (pantograph) Punch. This photo is staged; the keyboard layout is for the Farm card (leftmost column is labeled

A keypunch is a device for precisely punching holes into stiff paper cards at specific locations as determined by keys struck by a human operator.

For Jacquard looms, the resulting punched cards were joined together to form a paper tape containing a program that, when read by a loom, directed its operation.

单词	Key puncher
释义	Key puncher 英语百科 Keypunch （重定向自Key puncher） A keypunch is a device for precisely punching holes into stiff paper cards at specific locations as determined by keys struck by a human operator. For Jacquard looms, the resulting punched cards were joined together to form a paper tape containing a program that, when read by a loom, directed its operation.
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