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  2. Plan 9 from Bell Labs - Wikipedia

    en.wikipedia.org/wiki/Plan_9_from_Bell_Labs

    Plan 9 from Bell Labs is a distributed operating system which originated from the Computing Science Research Center (CSRC) at Bell Labs in the mid-1980s and built on UNIX concepts first developed there in the late 1960s. Since 2000, Plan 9 has been free and open-source. The final official release was in early 2015.

  3. 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 other ...

  4. A Commentary on the UNIX Operating System - Wikipedia

    en.wikipedia.org/wiki/A_Commentary_on_the_UNIX...

    A Commentary on the Sixth Edition UNIX Operating System by John Lions (later reissued as Lions' Commentary on UNIX 6th Edition [1] [2] and commonly referred to as the Lions Book) is a highly influential [3] 1976 publication containing analytical commentary on the source code of the 6th Edition Unix computer operating system "resident nucleus" [4] (i.e., kernel) software, plus copy formatted ...

  5. OS-9 - Wikipedia

    en.wikipedia.org/wiki/OS-9

    OS-9 is a family of real-time, process-based, multitasking, multi-user operating systems, developed in the 1980s, originally by Microware Systems Corporation for the Motorola 6809 microprocessor. It was purchased by Radisys Corp in 2001, and was purchased again in 2013 by its current owner Microware LP.

  6. Linux - Wikipedia

    en.wikipedia.org/wiki/Linux

    This is an accepted version of this page This is the latest accepted revision, reviewed on 19 September 2024. Family of Unix-like operating systems This article is about the family of operating systems. For the kernel, see Linux kernel. For other uses, see Linux (disambiguation). Operating system Linux Tux the penguin, the mascot of Linux Developer Community contributors, Linus Torvalds ...

  7. History of free and open-source software - Wikipedia

    en.wikipedia.org/wiki/History_of_free_and_open...

    v. t. e. The history of free and open-source software begins at the advent of computer software in the early half of the 20th century. In the 1950s and 1960s, computer operating software and compilers were delivered as a part of hardware purchases without separate fees. At the time, source code —the human-readable form of software—was ...

  8. C (programming language) - Wikipedia

    en.wikipedia.org/wiki/C_(programming_language)

    C (pronounced / ˈsiː / – like the letter c) [6] is a general-purpose programming language. It was created in the 1970s by Dennis Ritchie and remains very widely used and influential. By design, C's features cleanly reflect the capabilities of the targeted CPUs. It has found lasting use in operating systems code (especially in kernels [7 ...

  9. Open-source software - Wikipedia

    en.wikipedia.org/wiki/Open-source_software

    This is an accepted version of this page This is the latest accepted revision, reviewed on 25 September 2024. Software licensed to ensure source code usage rights Open-source software shares similarities with free software and is part of the broader term free and open-source software. For broader coverage of this topic, see Open-source-software movement. It has been suggested that this article ...