The punched card - IBM
The 1935 Social Security Administration contract required millions of IBM punched cards and tabulating machines to process data and print checks. IBM’s Fred M. Carroll developed a series of high-speed rotary presses that …
Punched card - Wikipedia
The Hollerith punched cards used for the 1890 U.S. census were blank. Following that, cards commonly had printing such that the row and column position of a hole could be easily seen. Printing could include having fields named and marked by vertical lines, logos, and more. "General purpose" layouts (see, for example, the IBM 5081 below) were also available. For appli…
Wikipedia · CC-BY-SA 许可下的文字The IBM 029 Card Punch - Two-Bit History
2018年6月23日 · One of the most widely used card punch machines was the IBM 029. It is perhaps the best remembered card punch today. The IBM 029 was released in 1964 as part of IBM’s System/360 rollout.
Punched card input/output - Wikipedia
• CDC 405 — CDC 6000 series card reader, 1200 or 1600 cards per minute (CPM)
• CDC 415 — CDC 6000 series card punch, 250 cards per minute
Documation Inc., of Melbourne, Florida, made card readers for minicomputers in the 1970s:Wikipedia · CC-BY-SA 许可下的文字- 预计阅读时间：7 分钟
The IBM 029 Key Punch - Columbia University
2024年6月28日 · The IBM 29 Card Punch (also called the 029 or Type 029 Key Punch or Keypunch), introduced about 1964 to coincide with the introduction of the IBM 360. Available …
Computer programming in the punched card era
Computer programming in the punched card era. Student programmers at the Technische Hochschule in Aachen, West Germany in 1970 using IBM 026 keypunches. Punched card from a Fortran program. From the invention of …
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打孔卡 - 维基百科，自由的百科全书
打孔卡，也稱穿孔卡（英語： Punched card ）又称霍爾瑞斯式卡或IBM卡，是一塊紙板，在預先知道的位置利用打洞與不打洞來表示數位訊息。 現在幾乎是一個過時的 存储器 ，但其設計轉 …
The IBM 026 Key Punch - Columbia University
An expert key punch operator in data-entry applications, with the aid of a well-designed program card, could punch 200 cards per hour. There was a huge market for key punch operators in the 1950s and 60s.
The punched card tabulator | IBM
The Hollerith Printing Tabulator and Summary Card Punch from 1929. An electrical counting machine automated data handling, transformed industries, and became the basis for a highly profitable new company called IBM.
IBM Punch Cards - Columbia University
Programs and data were punched by hand on a key punch machine such as the IBM 026 and fed into a card reader like the IBM 2501. Large computing sites such as Columbia University purchased cards by the truckload and …
