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aperture card

noun
1.
a punched-card mounting for microfilmed pages.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for aperture card
  • The aperture card format limits the abbreviation to five characters.
  • For example, for the use copy of large format drawings an aperture card might be appropriate.

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