Computer punched card reader —a computer input device used to read executable computer programs and data from punched cards under computer control. Card readers, found in early computers, could …

The punched card preceded floppy disks, magnetic tape and the hard drives of later computers as the first automated information storage device, increasing efficiency and speed, and significantly …

Jun 25, 2025 · What Is a Punch Card? Punch cards (or " punched cards "), also known as Hollerith cards or IBM cards, are paper cards where holes may be punched by hand or machine to represent …

When IBM and Remington Rand began selling electronic computers in the years following World War II, punch cards became the preferred method of entering data and programs onto them. They also were …

Aug 10, 2025 · In some computers, the result could also be punched onto new cards using a card punch connected to the mainframe. These output cards could then be used as input for some other program.

Used in everything from census data and payroll systems to scientific computing and early programming, IBM punch cards were a cornerstone of information processing before being replaced …

From the 1890 U.S. Census until into the 1990s the Punch Card played a significant role in the processing of data. The beginning of the end was heralded in the 1960s, when alternative storage …

Punched cards are considered the first of three machine attacks developed at Bletchley Park, the second was the Bombe (an automated data sorting device to crack the settings of the Enigma...

Punched cards, a mainstay of early office automation and computing, helped launch the transition from doing math to processing data. Patterns of holes punched in cards can represent any kind of …

Punched cards were a very popular medium for input/output and data storage in the early period of computer usage. Data was stored in them by the presence, or absence, of holes punched in pre …