Aperture card

An aperture card is a punched card with a cut-out window into which a chip of microfilm is mounted. The card is typically punched with machine-readable metadata associated with the microfilm image, and printed across the top of the card for visual identification.

Aperture cards are used for archiving, for making multiple inexpensive copies of a document for ease of distribution, and for engineering drawings.

Machinery exists to automatically store, retrieve, sort, duplicate, create, and digitize cards with a high level of automation. Aperture cards can be converted to digital documents using scanning equipment and software.

This article is issued from Wikipedia. The text is available under Creative Commons Attribution-Share Alike 4.0 unless otherwise noted. Additional terms may apply for the media files.