The stored program feature considerably influenced

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Unformatted text preview: ically directing the flow of operations. The stored program feature considerably influenced the development of modern digital computers and because of this feature we often refer to modern digital computers as stored program digital computers. The Electronic Discrete Variable Automatic Computer (EDVAC) was designed on stored program concept. Von Neumann has also got a share of the credit for introducing the idea of storing both instructions and data in the binary form (a system that uses only two digits - 0 & 1 to represent all characters) instead of the decimal numbers or human readable words. 5. The EDSAC (1947-49). Almost simultaneously with EDVAC of U.S.A., the Britishers developed the Electronic Delay Storage Automatic Calculator (EDSAC). The machine executed its first program in May 1949. In this machine, addition operation was accomplished in 1500 microseconds, and multiplication operation in 4000 microseconds. The machine was developed by a group of scientists headed by Professor Maurice Wilkes at the Cambridge University Mathematical Laboratory. 6. Manchester Mark I (1948). This computer was a small experimental machine based on the stored program concept. It was designed at Manchester University by a group of scientists headed by Professor M. H. A. Newman. Its storage capacity was only 32 words, each of 31 binary digits. This was too limited to store data and instructions. Hence, the Manchester Mark I was hardly of any practical use. 7. The UNIVAC I (1951). The Universal Automatic Computer (UNIVAC) was the first digital computer, which was not "one of a kind". Many UNIVAC machines were produced, the first of which was installed in the Census Bureau in 1951 and was used continuously for 10 years. The first business use of a computer, a UNIVAC I, was by General Electric Corporation in 1954. In 1952, the International Business Machines (IBM) Corporation introduced the 701 commercial computer. In rapid succession, improved models of the UNIVAC I and other 700-series machines were introduced. In 1953, IBM produc...
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