punched cards

punch card

noun
a card having holes punched in specific positions and patterns so as to represent data to be stored or processed mechanically, electrically, or photoelectrically.
Also, punch·card, punched card.


Origin:
1940–45
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Punched cards is always a great word to know.
So is doohickey. Does it mean:
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
a gadget; dingus; thingumbob.
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