However the actual discovery occurred more than 20 years earlier. A number of improvements were made to ENIAC after 1947, including a primitive read-only stored programming mechanism using the function tables as program ROM,[63][64][65] after which programming was done by setting the switches. The Mark IV was all-electronic, replacing the remaining mechanical components with magnetic core memory. [68] Clippinger consulted with von Neumann on what instruction set to implement. The circuit that was on indicated the digit represented. The latter employed vacuum tubes to speed up calculations. By 1956, the end of its operation, the ENIAC occupied about 1,800 square feet with almost 20,000 vacuum tubes, 1,500 relays, 10,000 capacitors, and 70,000 ENIAC: First computer makes history | ZDNET It was only when I became a technology writer some years later that I realized that my landlord had invented the computer. D. None of the Above. According to the Oxford Encyclopedic Dictionary (see Earliest Known Uses of Some of the Words of Mathematics), an entry BINARY ARITHMETIC first appeared in English in 1796 in A Mathematical and Philosophical Dictionary. The military intelligence gathered by these systems was essential to the Allied war effort. The program counter was three digits of one accumulator, the central accumulator was another accumulator, the address pointer for reading data from the function tables was the third accumulator, and the majority of the other accumulators (15, 7, 914, 1719) were utilized for data memory. C. Octal D. Hexadecimal A vacuum-tube computer, now termed a first-generation computer, is a computer that uses vacuum tubes for logic circuitry. First electronic general-purpose digital computer, Four ENIAC panels and one of its three function tables, on display at the School of Engineering and Applied Science at the University of Pennsylvania, Role in development of the Monte Carlo methods, Eckert Jr., John Presper and Mauchly, John W.; Electronic Numerical Integrator and Computer, United States Patent Office, US Patent 3,120,606, filed 1947-06-26, issued 1964-02-04; invalidated 1973-10-19 after court ruling in. To regulate all the power-supply voltages and prevent surges and dips from the power grid from affecting computer operation, power was derived from a motor-generator set that improved the stability and regulation of power-supply voltages. It was formally accepted by the U.S. Army Ordnance Corps in July 1946. Mercury delay-line memory was used by J.Presper Eckert in the EDVAC and UNIVACI. Eckert and John Mauchly received a patent for delay-line memory in 1953.

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