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  2. 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.

  3. Shell (computing) - Wikipedia

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

    In computing, a shell is a computer program that exposes an operating system 's services to a human user or other programs. In general, operating system shells use either a command-line interface (CLI) or graphical user interface (GUI), depending on a computer's role and particular operation. It is named a shell because it is the outermost ...

  4. Unix - Wikipedia

    en.wikipedia.org/wiki/Unix

    The Unix operating system consists of many libraries and utilities along with the master control program, the kernel. The kernel provides services to start and stop programs, handles the file system and other common "low-level" tasks that most programs share, and schedules access to avoid conflicts when programs try to access the same resource ...

  5. System software - Wikipedia

    en.wikipedia.org/wiki/System_software

    System software was usually supplied by the manufacturer of the computer hardware and was intended to be used by most or all users of that system. Many operating systems come pre-packaged with basic application software. Such software is not considered system software when it can be uninstalled without affecting the functioning of other ...

  6. How to Find Out if You Have the Most Updated Operating System

    www.aol.com/.../blog/most-updated-operating-system

    An operating system is a software program that allows users to interact with the computer or mobile device and run applications (like Microsoft Office, Google Chrome, Facebook, etc). Examples of ...

  7. History of operating systems - Wikipedia

    en.wikipedia.org/wiki/History_of_operating_systems

    Computer operating systems (OSes) provide a set of functions needed and used by most application programs on a computer, and the links needed to control and synchronize computer hardware. On the first computers, with no operating system, every program needed the full hardware specification to run correctly and perform standard tasks, and its ...

  8. Microsoft Windows - Wikipedia

    en.wikipedia.org/wiki/Microsoft_Windows

    Microsoft Windows is a product line of proprietary graphical operating systems developed and marketed by Microsoft.It is grouped into families and sub-families that cater to particular sectors of the computing industry -- Windows (unqualified) for a consumer or corporate workstation, Windows Server for a server and Windows IoT for an embedded system.

  9. Systems programming - Wikipedia

    en.wikipedia.org/wiki/Systems_programming

    Systems programming, or system programming, is the activity of programming 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 software ...