Glen Beck (background) and Betty Snyder (foreground) program the ENIAC (Electronic Numerical Integrator And Computer) in 1946. ENIAC is generally recognized as the world's first computer.

Photograph courtesy U.S. Army
  • On February, 14, 1946, one of the world's first electronic digital computers—ENIAC—was demonstrated to the public. It was shown at the University of Pennsylvania School of Engineering and Applied Science. The computer was designed by engineer J. Presper Eckert and physicist John Mauchly. ENIAC (Electronic Numerical Integrator and Computer) was 1,000 times faster at calculations than previous electro-mechanical machines. ENIAC was much larger and much slower than modern computers, however. It stood 63 square meters (680 square feet), weighed 27 tons, and took weeks to program.
    ENIAC is the grandfather of modern computer systems. Its development led to personal computers and the systems that support the Internet
  • Term Part of Speech Definition Encyclopedic Entry
    calculation Noun

    forecast, or estimation based on facts.

    computer Noun

    device designed to access data, perform prescribed tasks at high speed, and display the results.

    digital Adjective

    having to do with numbers (or digits), often in a format used by computers.

    electronics Noun

    devices or tools that use electricity to work.

    engineering Noun

    the art and science of building, maintaining, moving, and demolishing structures.

    Internet Noun

    vast, worldwide system of linked computers and computer networks.

    physicist Noun

    person who studies the relationship between matter, energy, motion, and force.