| 释义 |
DictionarySeepunch cardsorting needle
sorting needleA device that enabled punch card operators to determine if a column in a large deck of cards (data records) was punched with the same code (same hole). If a card deck only an inch or so thick was held to the light, one could see through the holes; however, a four or five-inch deck of cards required the needle. The only other method was to break up the deck into smaller chunks or wire a tabulating machine plugboard and print the contents. The needle was quicker. See punch card.
 | | Punch Card and Needle |
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| The needle was carefully inserted and jiggled to see if it would pass through the entire deck. These examples are IBM 80-column cards, whereas Remington Rand's 90-column cards had round holes, and the needle looked like an ice pick. (Needle image courtesy of Clarence Thompson.) |
 | | Punch Card and Needle |
|---|
| The needle was carefully inserted and jiggled to see if it would pass through the entire deck. These examples are IBM 80-column cards, whereas Remington Rand's 90-column cards had round holes, and the needle looked like an ice pick. (Needle image courtesy of Clarence Thompson.) |
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