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  2. Central processing unit - Wikipedia

    en.wikipedia.org/wiki/Central_processing_unit

    A central processing unit ( CPU ), also called a central processor, main processor, or just processor, is the most important processor in a given computer. [1] [2] Its electronic circuitry executes instructions of a computer program, such as arithmetic, logic, controlling, and input/output (I/O) operations. [3] [4] [5] This role contrasts with ...

  3. Computer - Wikipedia

    en.wikipedia.org/wiki/Computer

    A computer is a machine that can be programmed to automatically carry out sequences of arithmetic or logical operations ( computation ). Modern digital electronic computers can perform generic sets of operations known as programs. These programs enable computers to perform a wide range of tasks. The term computer system may refer to a nominally ...

  4. Computer security - Wikipedia

    en.wikipedia.org/wiki/Computer_security

    An example of physical security measure: a metal lock on the back of a personal computer to prevent hardware tampering. Computer security, cybersecurity, digital security or information technology security (IT security) is the protection of computer systems and networks from attacks by malicious actors that may result in unauthorized information disclosure, theft of, or damage to hardware ...

  5. Operating system - Wikipedia

    en.wikipedia.org/wiki/Operating_system

    A real-time operating system (RTOS) is an operating system intended for applications with fixed deadlines ( real-time computing ). Such applications include some small embedded systems, automobile engine controllers, industrial robots, spacecraft, industrial control, and some large-scale computing systems.

  6. Windows 10 - Wikipedia

    en.wikipedia.org/wiki/Windows_10

    Windows 10 is a major release of Microsoft 's Windows NT operating system. It is the direct successor to Windows 8.1, which was released nearly two years earlier. It was released to manufacturing on July 15, 2015, and later to retail on July 29, 2015. [20]

  7. Information technology - Wikipedia

    en.wikipedia.org/wiki/Information_technology

    Information science. Information technology ( IT) is a set of related fields that encompass computer systems, software, programming languages and data and information processing and storage. [1] IT forms part of information and communications technology (ICT). [2] An information technology system ( IT system) is generally an information system ...

  8. List of home computers - Wikipedia

    en.wikipedia.org/wiki/List_of_home_computers

    Homebuilt computer. List of home computers by video hardware classified by video interface. List of computers running CP/M contains a list of personal computers running CP/M. These were usually intended for small office use. List of Soviet computer systems includes many "home" systems as well as office and "big iron" systems.

  9. Mechanical computer - Wikipedia

    en.wikipedia.org/wiki/Mechanical_computer

    A mechanical computer is a computer built from mechanical components such as levers and gears rather than electronic components. The most common examples are adding machines and mechanical counters, which use the turning of gears to increment output displays. More complex examples could carry out multiplication and division—Friden used a ...