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.
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.
Source: Wikipedia "Aperture card" · CC BY-SA 4.0
Share this article: X · Bluesky