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  1. Computer | Definition, History, Operating Systems, & Facts

    A computer is a programmable device for processing, storing, and displaying information. Learn more in this article about modern digital electronic computers and their design, constituent …

  2. What is a computer? | Britannica - Encyclopedia Britannica

    A computer is a machine that can store and process information. Most computers rely on a binary system, which uses two variables, 0 and 1, to complete tasks such as storing data, calculating …

  3. Computer - History, Technology, Innovation | Britannica

    4 days ago · The history of the solving of these problems is the history of the computer. That history is covered in this section, and links are provided to entries on many of the individuals …

  4. Computer - Technology, Invention, History | Britannica

    The mill was the calculating unit, analogous to the central processing unit (CPU) in a modern computer; the store was where data were held prior to processing, exactly analogous to …

  5. computer - Kids | Britannica Kids | Homework Help

    A computer system requires both hardware and software. Hardware is the computer’s physical parts. Software is the programs, or instructions, that tell the hardware what to do.

  6. Computer science | Definition, Types, & Facts | Britannica

    May 29, 2025 · Computer science is the study of computers and computing, including their theoretical and algorithmic foundations, hardware and software, and their uses for processing …

  7. Computer - Memory, Storage, Processing | Britannica

    Computer - Memory, Storage, Processing: The earliest forms of computer main memory were mercury delay lines, which were tubes of mercury that stored data as ultrasonic waves, and …

  8. Personal computer (PC) | Definition, History, & Facts | Britannica

    Jun 11, 2025 · personal computer (PC), a digital computer designed for use by only one person at a time.

  9. Digital computer | Evolution, Components, & Features | Britannica

    Digital computer, any of a class of devices capable of solving problems by processing information in discrete form. It operates on data, including magnitudes, letters, and symbols, that are …

  10. Computer program | Definition & Facts | Britannica

    computer program, detailed plan or procedure for solving a problem with a computer; more specifically, an unambiguous, ordered sequence of computational instructions necessary to …