ohjauskortit
Ohjauskortit, also known as control cards, are a type of punch card used in early computing systems for controlling the operation of a computer. They were first introduced in the 1950s and were widely used until the 1970s. Ohjauskortit are rectangular cards made of stiff paper, typically 80 columns wide and 12 rows high, with holes punched in specific patterns to represent data or instructions.
The holes in the ohjauskortit are read by a card reader, which converts the physical presence or
Ohjauskortit were used for various purposes, including program storage, data input, and output control. They were
The use of ohjauskortit gradually declined with the advent of magnetic tape and disk storage, which offered