punched card

Perforated computing input

A punched card is a stiff paper card that stores data as patterns of holes in specific positions.

Machines read the presence or absence of holes to process information.

Punched cards were the primary input medium for early computers through the mid-20th century: The programmer submitted her job as a deck of punched cards.

Also called punch card.

computing

Hollerith

Punch card computing inventor

  • IBMMultinational technology corporation
  • mainframeLarge centralized computer system
  • tabulatingRecording data systematically

keypunch · data processing · batch processing · sorter · collator · chad · perforation · data entry · ENIAC · UNIVAC

census

Hollerith

Punch card computing inventor

enumeration · data collection · sorting · counting · survey · record keeping · government · bureaucracy

voting

ballot

Voting document

  • chadPunched-out paper bits
  • hanging chadIncompletely detached ballot perforation
  • FloridaSoutheastern American peninsula state

recount · polling · vote counting · election · precinct · tabulation · butterfly ballot · voter intent

programming

COBOL

Elderly business-oriented programming language

coding · flowchart · debugging · machine code · batch processing · subroutine · algorithm · instruction set · loop · programmer

Jacquard

loom

Fabric-making frame

  • textileMaterial from woven fibers
  • weavingInterlacing strands into fabric
  • patternRecurring arrangement or template

silk · brocade · automation · mechanical · fabric · Lyon · harness · warp · weft

Categories
Opposites
data storage technology evolution

punched cardsolid-state drive

Flash-based persistent storage

cloud storage · flash memory · magnetic tape · hard disk · USB drive

data encoding method

punched cardmagnetic storage

Data kept via magnetism

optical storage · solid-state memory · keyboard input

Family

punch, punched, punching, punches, puncher, card, cards, carded, carding

Familiarity
Top 500,000
Profile
Used worldwide · Timeless · Concrete · Rated G