aperture card
Records Management
An electronic data processing card with an opening that contains one frame of microfilm Note: This frame is usually cut from a roll of microfilm. Characteristics of aperture cards are specified in several standards including Unitized Microfilm Carriers (Aperture, Camera, Copy, and Image Cards (ANSI/AIIM MS41-1996) [1] and Microfilming of Technical Drawings and Other Drawing Office Documents ? Part 3: Aperture Card for 35 mm Microfilm (ISO 3272-3: 2001) [9].
A punched card incorporating a window into which a piece of microfilm can be inserted.
E-Discovery
An IBM punch card with a window which holds a 35mm frame of microfilm. Indexing information is punched in the card.