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  2. Operating system - Wikipedia

    en.wikipedia.org/wiki/Operating_system

    An operating system is difficult to define, [6] but has been called "the layer of software that manages a computer's resources for its users and their applications". [7] ...

  3. Classes of computers - Wikipedia

    en.wikipedia.org/wiki/Classes_of_computers

    Minicomputers (colloquially, minis) are a class of multi-user computers that lie in the middle range of the computing spectrum, in between the smallest mainframe computers and the largest single-user systems (microcomputers or personal computers).

  4. Computer - Wikipedia

    en.wikipedia.org/wiki/Computer

    A human computer, with microscope and calculator, 1952. It was not until the mid-20th century that the word acquired its modern definition; according to the Oxford English Dictionary, the first known use of the word computer was in a different sense, in a 1613 book called The Yong Mans Gleanings by the English writer Richard Brathwait: "I haue [] read the truest computer of Times, and the best ...

  5. Computer hardware - Wikipedia

    en.wikipedia.org/wiki/Computer_hardware

    PDP-11 CPU board. Computer hardware includes the physical parts of a computer, such as the central processing unit (CPU), random access memory (RAM), motherboard, computer data storage, graphics card, sound card, and computer case.

  6. Information system - Wikipedia

    en.wikipedia.org/wiki/Information_system

    An information system (IS) is a formal, sociotechnical, organizational system designed to collect, process, store, and distribute information. [1] From a sociotechnical perspective, information systems comprise four components: task, people, structure (or roles), and technology. [2]

  7. Systems programming - Wikipedia

    en.wikipedia.org/wiki/Systems_programming

    Systems programming, or system programming, is the activity of programming [1] computer system software.The primary distinguishing characteristic of systems programming when compared to application programming is that application programming aims to produce software which provides services to the user directly (e.g. word processor), whereas systems programming aims to produce software and ...

  8. Computer security - Wikipedia

    en.wikipedia.org/wiki/Computer_security

    An example of a physical security measure: a metal lock on the back of a personal computer to prevent hardware tampering. Computer security (also cybersecurity, digital security, or information technology (IT) security) is the protection of computer software, systems and networks from threats that can lead to unauthorized information disclosure, theft or damage to hardware, software, or data ...

  9. User interface - Wikipedia

    en.wikipedia.org/wiki/User_interface

    The Xfce desktop environment offers a graphical user interface following the desktop metaphor.. In the industrial design field of human–computer interaction, a user interface (UI) is the space where interactions between humans and machines occur.