The history of computers

  • The first Mechanical Calculator

    Pascal gear system was the first Mechanical Calculator, 5. The Pascaline, had several disadvantages. Although it did offer a substantial improvement over manual calculations, only Pascal himself could repair the device and it Cost more than the people it replaced
  • International Business Machines (IBM).

    Hollerith's tabulator became so successful that he started his own firm to market the device; this company eventually became International Business Machines (IBM).
  • Charles Babbage

    Charles Babbage, was the most recent year forefather of the modern day computers.

    A step toward automated computation was the introduction of EDVAC, which were first successfully used in connection with computing in 1890 by John von Neumann working for the U.S. Census Bureau. He developed a device which could automatically read census information which had been punched onto card.
  • ENAC

    The ENAC caused the first signs of technophobia emerged with mathematicians fearing the loss of their jobs due to progress, ENAC was intended to be steam-powered; fully automatic, even to the printing of the resulting tables; and commanded by a fixed instruction program. The ENAC was a real parallel decimal computer which would operate on words of 50 decimals and was able to store 1000 such numbers. The instructions for the machine were to be stored on Processer, similar to those used
  • ENAC pt.2

    The ENAC output was by card punch and electric typewriter.
    ENIAC also was the first machine to use more than 2,000 vacuum tubes, using nearly 18,000 vacuum tubes. Storage of all those vacuum tubes and the machinery required to keep the cool took up over 167 square meters (1800 square feet) of floor space. ENAC is generaly ackknoledged to be the first successful high-speed "Electronic Digital Computer"(EDC) and was productivley used from 1946 to 1955.
  • PC

    In 1822, Charles Babbage began developing the Difference Engine, considered to be the first automatic computing engine Unfortunately, because of funding he was never able to complete a full-scale functional version of this machine. However, in June of 1991 the London Science Museum completed the Difference Engine No 2 for the bicentennial year of Babbage's birth and later completed the printing mechanism. In The PC was designed to perform logical operations and could read write and erase.
  • BC Abacus

    ABACUS was developed because businesspersons needed a way to tally accounts and bills., It could take Data or Hours of laborious work by hand to verify the correctness of a proposed theorem.