An 80-column tabulating sized card with a hole, or aperture, containing usually one frame of 35-mm microfilm. Generally used for engineering drawings, maps and charts, and x rays.
A card with a rectangular hole(s) designed for holding one or more frames of microfilm.
A card with a rectangular opening into which microfilm may be inserted.
a card with one or more rectangular opening(s)
a two-fold card with a pre-cut shape in the front of the card
Aperture Card is a mount for a single 35mm microfilm frame, usually carrying a typed description of the microfilm image. Based on a hollerith punched card, can carry punched data allowing for automatic retrieval in a suitable punched card reader.
An IBM punch card with a window that holds a 35mm frame of microfilm. Indexing information is punched in the card.
Typically 35mm frames held on a card that sometimes contains hollerith (punch hole) data.
card which holds a 35mm film image of a document, often used for maps and plans.
A standard-size tabulating card into which a rectangular hole has been cut. A special adhesive is then applied around the cut out area and is used to hold a microfilm image securely in place. The aperture card may be keypunched to permit mechanical retrieval of the microfilm image.
A card which holds microfilm intended to protect the film and facilitate loading by a scanner or viewer.
A card 3.25" X 7.5" with a window holding a piece of 35mm film. Similar to Microfiche, but only hold a couple images.
is a standard Hollerith encoded IBM-style punch card that acts as a transport for a 35mm transparency. Typically, aperture cards are used to store blueprints and engineering drawings.
Used in data archiving, the aperture card is a small, simple piece of punched card-stock paper with a slip of microfilm appearing within a window in the card. The punches in the card, like a conventional punched card, contain data that a machine can rapidly read to aid in locating a particular card or for obtaining information from a selected card. The microfilm component contains an optically reduced image, usually some type of reference document, that is the focus of the archiving process.
