individually handled, especially those intended for the public to use and return is "Do Not Fold, Spindle or Mutilate" (in the UK "Do not bend, spike, fold or mutilate"). Coined by Charles A. Phillips, it became a motto for the post–World War II era (even though many people had no idea what spindle meant), and was widely mocked and satirized. Some 1960s students at Berkeley wore buttons saying: "Do not fold, spindle or mutilate. I am a student". The motto was also used for a 1970 book by Doris Miles Disney with a plot based around an early computer dating service and a 1971 made-for-TV movie based on that book, and a similarly titled 1967 Canadian short film, Do Not Fold, Staple, Spindle or Mutilate. Standards ANSI INCITS 21-1967 (R2002), Rectangular Holes in Twelve-Row Punched Cards (formerly ANSI X3.21-1967 (R1997)) Specifies the size and location of rectangular holes in twelve-row punched cards. ANSI X3.11-1990 American National Standard Specifications for General Purpose Paper Cards for Information Processing ANSI X3.26-1980 (R1991) Hollerith Punched Card Code ISO 1681:1973 Information processing – Unpunched paper cards – Specification ISO 6586:1980 Data processing – Implementation of the ISO 7- bit and 8- bit coded character sets on punched cards. Defines ISO 7-bit and 8-bit character sets on punched cards as well as the representation of 7-bit and 8-bit combinations on 12-row punched cards. Derived from, and compatible with, the Hollerith Code, ensuring compatibility with existing punched card files. Punched card devices Processing of punched cards was handled by a variety of machines, including: Keypunches—machines with a keyboard that punched cards from operator entered data. Unit record equipment—machines that process data on punched cards. Employed prior to the widespread use of digital computers. Includes card sorters, tabulating machines and a variety of other machines Computer punched card reader—a computer input device used to read executable computer programs and data from punched cards under computer control. Computer card punch—a computer output device that punches holes in cards under computer control. Voting machines—used into the 21st century See also Aperture card Card image Computer programming in the punched card era Edge-notched card History of computing hardware Kimball tag—punched card price tags Paper data storage Punched card input/output Punched tape Lace card Notes References Further reading (NB. An accessible book of recollections (sometimes with errors), with photographs and descriptions of many unit record machines.) (NB. An account of how IBM