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  2. Operating system - Wikipedia

    en.wikipedia.org/wiki/Operating_system

    An operating system ( OS) is system software that manages computer hardware and software resources, and provides common services for computer programs . Time-sharing operating systems schedule tasks for efficient use of the system and may also include accounting software for cost allocation of processor time, mass storage, peripherals, and ...

  3. Kernel (operating system) - Wikipedia

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

    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] It is the portion of the operating system code that is always resident ...

  4. List of SysML tools - Wikipedia

    en.wikipedia.org/wiki/List_of_SysML_tools

    Software license Programming language used Astah: ChangeVision, Inc. [1] Windows, macOS 2009-10-19 2023-03-12 (v9.0) [2] No Commercial Java Cameo Systems Modeler 3DS Catia, No Magic Windows, Linux, macOS Commercial Java Capella: Thales Group & Eclipse Foundation community Windows, Linux, macOS 2015-04-06 [3] 2020-11-17 (v5.0) [4] Yes EPL: Java ...

  5. Computer architecture - Wikipedia

    en.wikipedia.org/wiki/Computer_architecture

    Computer architecture. Block diagram of a basic computer with uniprocessor CPU. Black lines indicate control flow, whereas red lines indicate data flow. Arrows indicate the direction of flow. In computer science and computer engineering, computer architecture is a description of the structure of a computer system made from component parts. [ 1]

  6. Unix - Wikipedia

    en.wikipedia.org/wiki/Unix

    Unix ( / ˈjuːnɪks / ⓘ, YOO-niks; trademarked as UNIX) is a family of multitasking, multi-user computer operating systems that derive from the original AT&T Unix, whose development started in 1969 [ 1] at the Bell Labs research center by Ken Thompson, Dennis Ritchie, and others.

  7. Systems architecture - Wikipedia

    en.wikipedia.org/wiki/Systems_architecture

    A system architecture primarily concentrates on the internal interfaces among the system's components or subsystems, and on the interface (s) between the system and its external environment, especially the user. (In the specific case of computer systems, this latter, special, interface is known as the computer human interface, AKA human ...

  8. Block diagram - Wikipedia

    en.wikipedia.org/wiki/Block_diagram

    A block diagram is a diagram of a system in which the principal parts or functions are represented by blocks connected by lines that show the relationships of the blocks. [ 1] They are heavily used in engineering in hardware design, electronic design, software design, and process flow diagrams . Block diagrams are typically used for higher ...

  9. Comparison of operating systems - Wikipedia

    en.wikipedia.org/.../Comparison_of_operating_systems

    These tables provide a comparison of operating systems, of computer devices, as listing general and technical information for a number of widely used and currently available PC or handheld (including smartphone and tablet computer) operating systems. The article "Usage share of operating systems" provides a broader, and more general, comparison ...