Microform
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A microform is a scaled-down reproduction of a document made for the purposes of transmission, storage, reading, and printing. The original document is typically in the form of photographic film or pa
Digital scanning of microfilm
Positive 35mm 15X silver-gelatin microfilm reel
Negative 16mm 24X diazo microfilm reel
Negative 16mm COM microfilm reel
Aperture card
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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, an
Microform
…in the form of photographic film or paper. Four formats are common: microfilm (reels), microfiche (flat sheets), micro-opaques (like microcards), and aperture cards. In addition to filming from original paper documents, equipment is available that accepts a data stream from a computer and directly produces a…
A backlit aperture card showing hollerith holes and the microform image, with the label "Register of deeds. Waukesha County, Wisconsin"
Ronald Kay, chief executive of UCCA, is seen holding an aperture card. The cards held a microfilm image of a candidate's applications to UK universities, and were used to print batches of applications sorted by the university and course applied to.