Use of Punched Cards by Hollerith

Use of Punched Cards by Hollerith the f In 1890, Herman Hollerith developed the first electro-mechanical punched card tabulator. The tabulator could read the information that was punched into cards. These cards were kept in stack form. The solution to different problems can be stored on different stacks of cards and accessed when needed. Comp Circu computer manufacturers came forward and started producing of punched-card using computers. These computers could add, multiply and sort numbers. Data were produced on punched cards. Invention of punched cards opened a gate to modern data processing. IBM and other ed and results comp develo per equipn processing card per minute, holding each card holding about 80 decimal numbers (characters). At that time to today's machines, these computers were slow, usually 50 - 220 times, however, punched cards were a major step forward. They provided a means for Input / Output (/ O), and memory storage on a huge scal These w 1.1.5 Electronic Digital Computers The start of World War II has a large need for computer capacity, military. The new weapons were made for which a large number of calculation was 1942 John P. Eckert, John W. Machly and his colleagues at the Moore School of 1942

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