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A punched card (also punch card or punched-card ) is a piece of card stock that stores digital data using punched holes. Punched cards were once common in data processing and the control of automated machines. Punched cards were widely used in the 20th century, where unit record machines, organized into data … 展开
The idea of control and data storage via punched holes was developed independently on several occasions in the modern period. In most cases there is no evidence that each of the … 展开
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. … 展开
While punched cards have not been widely used for generations, the impact was so great for most of the 20th century that they still appear from … 展开
Processing of punched cards was handled by a variety of machines, including:
• Keypunches—machines with a keyboard that punched cards from operator entered data.
• Unit record equipment—machines that process data on punched … 展开The terms punched card, punch card, and punchcard were all commonly used, as were IBM card and Hollerith card (after Herman Hollerith). … 展开
IBM's Fred M. Carroll developed a series of rotary presses that were used to produce punched cards, including a 1921 model that operated at 460 cards per minute (cpm). In 1936 he … 展开
CC-BY-SA 许可证中的维基百科文本 Herman Hollerith - Wikipedia
Herman Hollerith (February 29, 1860 – November 17, 1929) was an American statistician, inventor, and businessman who developed an electromechanical tabulating machine for punched cards to assist in summarizing information and, later, in accounting. His invention of the punched card tabulating machine, patented in 1884, marks the beginning of the era of mechanized binary code …
Wikipedia · CC-BY-SA 许可下的文字Herman Hollerith, the Inventor of Computer Punch …
2019年3月27日 · Hollerith invented and used a punched card device to help analyze the 1890 U.S. census data. His great breakthrough was his use of electricity to read, count and sort punched cards whose holes represented …
The punched card - IBM
Punched cards, also known as punch cards, dated to the late 18th and early 19th centuries when they were used to “program” cloth-making machinery and looms. In the late 1880s, inventor Herman Hollerith, who was inspired by train …
Herman Hollerith | Biography, Tabulating Machine,
2024年10月1日 · Herman Hollerith, American inventor of a tabulating machine that was an important precursor of the electronic computer. Hollerith’s machine recorded statistics by electrically reading and sorting punched cards that had …
Herman Hollerith - Columbia University
Herman Hollerith is widely regarded as the father of modern automatic computation. He chose the punched card as the basis for storing and processing information and he built the first punched-card tabulating and sorting …
The punched card tabulator | IBM
About 80 years prior, Joseph Marie Jacquard of France devised a way to use punched cards to automate steam-powered weaving looms. In the mid-1830s, English mathematician Charles Babbage developed plans for a computing …
NIHF Inductee Herman Hollerith Invented the Punch …
Herman Hollerith invented and developed a punch-card tabulation machine system that revolutionized statistical computation. Born in Buffalo, New York, Hollerith enrolled in the City College of New York at age 15 and …
Punch Cards for Data Processing | Smithsonian Institution
Punch Cards for Data Processing. In the late 1880s, American engineer Herman Hollerith saw a railroad punch card when he was trying to figure out new ways of compiling statistical information for the U.S. Census. His first punch card, like …
Herman Hollerith (1860 - 1929) - Biography - MacTutor History of ...
2012年2月29日 · Herman Hollerith was the inventor of the punched card system which predated electronic computers.
