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  2. Computer tower - Wikipedia

    en.wikipedia.org/wiki/Computer_tower

    In personal computing, a tower unit, or simply a tower, is a form factor of desktop computer case whose height is much greater than its width, thus having the appearance of an upstanding tower block, as opposed to a traditional "pizza box" computer case whose width is greater than its height and appears lying flat.

  3. Personal computer - Wikipedia

    en.wikipedia.org/wiki/Personal_computer

    An artist's depiction of a 2000s-era desktop-style personal computer, which includes a metal case with the computing components, a display monitor and a keyboard (mouse not shown) A personal computer, often referred to as a PC, is a computer designed for individual use. [1] It is typically used for tasks such as word processing, internet ...

  4. Air traffic control - Wikipedia

    en.wikipedia.org/wiki/Air_traffic_control

    Air control (known to pilots as tower or tower control) is responsible for the active runway surfaces. Air control gives clearance for aircraft takeoff or landing, whilst ensuring that prescribed runway separation will exist at all times.

  5. Power supply unit (computer) - Wikipedia

    en.wikipedia.org/wiki/Power_supply_unit_(computer)

    Power supply unit (computer) A power supply unit ( PSU) converts mains AC to low-voltage regulated DC power for the internal components of a computer. Modern personal computers universally use switched-mode power supplies. Some power supplies have a manual switch for selecting input voltage, while others automatically adapt to the main voltage.

  6. Ship gun fire-control system - Wikipedia

    en.wikipedia.org/wiki/Ship_gun_fire-control_system

    Ship gun fire-control systems (GFCS) are analogue fire-control systems that were used aboard naval warships prior to modern electronic computerized systems, to control targeting of guns against surface ships, aircraft, and shore targets, with either optical or radar sighting.

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      Century 21 Exposition - Wikipedia
      wikipedia.org
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  7. Central processing unit - Wikipedia

    en.wikipedia.org/wiki/Central_processing_unit

    The control unit (CU) is a component of the CPU that directs the operation of the processor. It tells the computer's memory, arithmetic and logic unit and input and output devices how to respond to the instructions that have been sent to the processor.

  8. Aviation light signals - Wikipedia

    en.wikipedia.org/wiki/Aviation_light_signals

    Aviation light signals. A United States Air Force airman with a signal light gun that can be used to control aircraft with radio failure. Air traffic control signal light gun in use at base flight tower. In the case of a radio failure or aircraft not equipped with a radio, or in the case of a deaf pilot, air traffic control may use a signal ...

  9. Desktop computer - Wikipedia

    en.wikipedia.org/wiki/Desktop_computer

    It has a monitor, keyboard, mouse, speakers, and a computer tower. The computer tower contains the motherboard and processor. A computer lab with desktop PCs with flat-panel monitors. A desktop computer (often abbreviated desktop) is a personal computer designed for regular use at a stationary location on or near a desk (as opposed to a ...

  10. Kernel (operating system) - Wikipedia

    en.wikipedia.org/wiki/Kernel_(operating_system)

    The kernel is a computer program at the core of a computer's operating system and generally has complete control over everything in the system. The kernel is also responsible for preventing and mitigating conflicts between different processes. [1]

  11. Signalling control - Wikipedia

    en.wikipedia.org/wiki/Signalling_control

    On a rail transport system, signalling control is the process by which control is exercised over train movements by way of railway signals and block systems to ensure that trains operate safely, over the correct route and to the proper timetable. Signalling control was originally exercised via a decentralised network of control points that were ...