| 释义 |
plugboard
plugboard (ˈplʌɡˌbɔːd) n (Electronics) another name for patchboardThesaurus| Noun | 1. |  plugboard - telephone central where circuits are completed with patchcordspatchboard, switchboardcentral, telephone exchange, exchange - a workplace that serves as a telecommunications facility where lines from telephones can be connected together to permit communicationphone system, telephone system - a communication system that transmits sound between distant points |
plugboard
plugboard[′pləg‚bȯrd] (computer science) control panel plugboardA board containing a matrix of sockets used to program a machine. Plugboards were widely used in punch card tabulating machines and early computers and were the predecessor to software programming. For example, each wire in the board directs a column of data from its source column to its destination which could be a print column or a card column to be punched. A wire could also function as a switch by closing a circuit. Complicated programs looked like "mounds of spaghetti." See punch card.
 | | Programming a Card Punch Machine |
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| This plugboard directed a machine to read the data in one card and punch the same holes in a blank card. Fields could be rearranged, and minor calculations could be performed. (Image courtesy of The Computer History Museum, www.computerhistory.org) |
 | | The Author of This Encyclopedia |
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| In 1962, Alan Freedman was a Tabulating Technician, a fancy title for "punch card programmer." Proud to be photographed in "his" office at Pennsylvania Sales Tax, he is really at one end of a 40-foot room. |
 | | He Loves that Pose |
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| Twenty years later, Freedman finally did have his own office two blocks from Penn Station in New York. |
MedicalSeepunch cardplugboard
Synonyms for plugboardnoun telephone central where circuits are completed with patchcordsSynonymsRelated Words- central
- telephone exchange
- exchange
- phone system
- telephone system
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