Accounting
Evolution of computer
The term Computer, originally meant a person capable of performing numerical calculations with the help of a mechanical computing device. The evolution of computers started way back in the late 1930s. Binary arithmetic is at the core of the computers of all times. History of computers dates back to the invention of a mechanical adding machine in 1642. ABACUS, an early computing tool, invention of logarithm by John Napier and the invention of slide rules by William Oughtred were significant events in the evolution of computers from these early computing devices.
1. First Generation (1939-1954) - vacuum tube
• 1937 - John V. Atanasoff designed the first digital electronic computer
• 1939 - Atanasoff and Clifford Berry demonstrate in Nov. the ABC prototype
• 1941 - Konrad Zuse in Germany developed in secret the Z3
• 1943 - In Britain, the Colossus was designed in secret at Bletchley Park to decode German messages
• 1944 - Howard Aiken developed the Harvard Mark I mechanical computer for the Navy
• 1945 - John W. Mauchly and J. Presper Eckert built ENIAC at U of PA for the U.S. Army
• 1946 - Mauchly and Eckert start Electronic Control Co., received grant from National Bureau of Standards to build a ENIAC-type computer with magnetic tape input/output, renamed UNIVAC in 1947 but run out of money, formed in Dec. 1947 the new company Eckert-Mauchly Computer Corporation (EMCC).
• 1948 - Howard Aiken developed the Harvard Mark III electronic computer with 5000 tubes
• 1948 - U of Manchester in Britain developed the SSEM Baby electronic computer with CRT memory
• 1949 - Mauchly and Eckert in March successfully tested the BINAC stored-program computer for Northrop Aircraft, with mercury delay line memory and a primitive magentic tape drive; Remington Rand bought EMCC Feb. 1950 and provided funds to finish UNIVAC
• 1950-...
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