What is a punched deck?

180 1 year: card period

Jacquard Jacquard Loom19th Century 1725, French textile worker Lu Xiuwei put punched paper tape on the loom for the convenience of weaving patterns, and his partner began to improve the design in 1726, replacing paper tape with punched cards in series, thus realizing semi-automatic production of manual feeding. 180 1 year, Frenchman jacquard invented the jacquard loom and used punch cards to control the pattern. Different from the former, this loom does not need to change the mechanical design when replacing a series of cards, which is a milestone of programmable machines.

1880, American statistician Hollerith developed a sorting machine in 1890, which used punch cards to store data, and then used machine sensing cards to help the United States.

He Yu 1896 founded the watchmaking machinery company. After several mergers and acquisitions, it became a part of IBM. By 1950, IBM cards have been widely used in industry and government agencies. In order to enable the card to be reused as a certification document, the warning words "Do not fold, curl or damage" were printed on the card, which later became a popular slogan in the post-world war II period [4].

FORTRAN programs in punched cards Until the 1970s, many computer devices still used cards as processing media. All over the world, college students from science or engineering departments submit homework programs to local computer centers with a large stack of cards, and then wait patiently in line for their programs to be processed, compiled and executed by large computers in computer centers. Once the execution is completed, the marked report will be printed and placed in the file tray outside the computer center. If a series of information such as grammatical errors in the program is finally printed, students will have to modify it and run the program again. Punch cards are still not extinct, and their special size (80 lines in length) is still used in various forms, records and programs all over the world.