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  2. Public address system - Wikipedia

    en.wikipedia.org/wiki/Public_address_system

    A public address system (or PA system) is an electronic system comprising microphones, amplifiers, loudspeakers, and related equipment. It increases the apparent volume (loudness) of a human voice, musical instrument, or other acoustic sound source or recorded sound or music.

  3. PA-RISC - Wikipedia

    en.wikipedia.org/wiki/PA-RISC

    PA-RISC (HP/PA) Precision Architecture RISC ( PA-RISC) or Hewlett Packard Precision Architecture ( HP/PA or simply HPPA ), is a general purpose computer instruction set architecture (ISA) developed by Hewlett-Packard from the 1980s until the 2000s . The architecture was introduced on 26 February 1986, when the HP 3000 Series 930 and HP 9000 ...

  4. 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.

  5. Sound reinforcement system - Wikipedia

    en.wikipedia.org/wiki/Sound_reinforcement_system

    A sound reinforcement system is the combination of microphones, signal processors, amplifiers, and loudspeakers in enclosures all controlled by a mixing console that makes live or pre-recorded sounds louder and may also distribute those sounds to a larger or more distant audience. [1] [2] In many situations, a sound reinforcement system is also ...

  6. Communications system - Wikipedia

    en.wikipedia.org/wiki/Communications_system

    Communications system. A communications system or communication system is a collection of individual telecommunications networks systems, relay stations, tributary stations, and terminal equipment usually capable of interconnection and interoperation to form an integrated whole. The components of a communications system serve a common purpose ...

  7. Daemon (computing) - Wikipedia

    en.wikipedia.org/wiki/Daemon_(computing)

    Daemon (computing) Components of some Linux desktop environments that are daemons include D-Bus, NetworkManager (here called unetwork ), PulseAudio ( usound ), and Avahi. In multitasking computer operating systems, a daemon ( / ˈdiːmən / or / ˈdeɪmən /) [1] is a computer program that runs as a background process, rather than being under ...

  8. Firewall (computing) - Wikipedia

    en.wikipedia.org/wiki/Firewall_(computing)

    Firewall (computing) In computing, a firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules. [1] [2] A firewall typically establishes a barrier between a trusted network and an untrusted network, such as the Internet. [3]

  9. 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 ...

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