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When was the first computer invented in the US?

Your question is flawed -- after something has been invented, no one else can "invent" it. But, for more information on the history and origins of computers, see this link: http://inventors.about.com/library/blcoindex.htm idiot u no wat i mean


What was the name of the first ass electrical computer that used wires and switches to transfer data?

I think it was the apple computer.


What was the first computer called?

The Harvard Mark 1 is usually credited as being the first computer, but these were also early computers Comparison with other early computers {| |+ Defining characteristics of five first operative digital computers |- ! Computer ! Shown working ! Binary ! Electronic ! Programmable ! Turing complete | Zuse Z3 May 1941 Yes No By punched film stock Yes (1998) Atanasoff-Berry Computer Summer 1941 Yes Yes No No Colossus December 1943 / January 1944 Yes Yes Partially, by rewiring No Harvard Mark I - IBM ASCC 1944 No No By punched paper tape Yes (1998) ENIAC 1944 No Yes Partially, by rewiring Yes 1948 No Yes By Function Table ROM Yes|}


What did John Von Neumann invent?

The mathematician John Von Neumann was involved in several key projects. He was a consultant on the ENIAC (Electronic Numerical Integrator And Computer), designed and constructed at the University of Pennsylvania, which was the world's first general-purpose electronic digital computer. The major credit for the ENIAC however, is generally given to John Mauchly, a professor of electrical engineering at the University of Pennsylvania, and John Eckert, one of his graduate students. The major drawback of the ENIAC was that it had to be programmed manually by setting switches and plugging and unplugging cables. The next major advance was the stored-program concept, which is attributed to the ENIAC designers but most especially to von Neumann. The first publication of the idea was in a 1945 proposal by von Neumann for a new computer, the EDVAC (Electronic Discrete Variable Computer). The EDVAC was never built, but in 1946, von Neumann and his colleagues began the design of a new stored-program computer, referred to as the IAS computer, at the Princeton Institute for Advanced Studies. The IAS computer, although not completed until 1952, is the prototype of all subsequent general-purpose computers. So the answer to your question is that von Neumann, with help from others, invented the concept of the store-program computer and then developed (you could say invented) the IAS computer.


How many vacuum tubes did the Harvard Mark I computer have?

None. The Harvard Mark 1 ASCC (IBM Automatic Sequence Controlled Calculator) was an electromechanical computer built for Harvard by IBM's Endicott NY facility in 1944. It was constructed from 765,000 components which included switches, relays, motors, rotating shafts, and clutches. It contained no vacuum tubes.The Harvard Mark III ADEC (Aiken Dahlgren Electronic Calculator) was the first computer to use vacuum tubes. It was built at Harvard in 1949 using 5000 vacuum tubes and 1500 crystal diodes, along with electromechanical components. The Harvard Mark IV, built in 1952, was the first fully electronic design.

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