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  2. exit (system call) - Wikipedia

    en.wikipedia.org/wiki/Exit_(system_call)

    On many computer operating systems, a computer process terminates its execution by making an exit system call. More generally, an exit in a multithreading environment means that a thread of execution has stopped running. For resource management, the operating system reclaims resources ( memory, files, etc.) that were used by the process.

  3. Business Operating System (software) - Wikipedia

    en.wikipedia.org/wiki/Business_Operating_System...

    Business Operating System (software) The Business Operating System, or BOS, was initially developed as an early cross-platform operating system, originally for Intel 8080 and Motorola 6800 microprocessors and then for actual businesses and business models. The technology was used in Zilog Z80 -based computers and later for most microcomputers ...

  4. Mac operating systems - Wikipedia

    en.wikipedia.org/wiki/Mac_operating_systems

    The current Mac operating system is macOS, originally named "Mac OS X" until 2012 and then "OS X" until 2016. [3] It was developed between 1997 and 2001 after Apple's purchase of NeXT. It brought an entirely new architecture based on NeXTSTEP, a Unix system, that eliminated many of the technical challenges that the classic Mac OS faced, such as ...

  5. Resident monitor - Wikipedia

    en.wikipedia.org/wiki/Resident_monitor

    In computing, a resident monitor is a type of system software program that was used in many early computers from the 1950s to 1970s. It can be considered a precursor to the operating system. [1] The name is derived from a program which is always present in the computer's memory, thus being resident. [2] Because memory was very limited on those ...

  6. List of Apple operating systems - Wikipedia

    en.wikipedia.org/.../List_of_Apple_operating_systems

    The original operating system for the Macintosh was the classic Mac OS, which was introduced in early 1984 as System Software. In 1997, System Software was renamed Mac OS. In 1999, Mac OS X Server 1.0 was released, followed by Mac OS X 10.0, the first consumer release of the Mac OS X.

  7. iOS - Wikipedia

    en.wikipedia.org/wiki/IOS

    iOS (formerly iPhone OS) is a mobile operating system developed by Apple Inc. exclusively for its smartphones. It was unveiled in January 2007 for the first-generation iPhone, launched in June 2007. It is the operating system that powers many of the company's mobile devices, including the iPhone.

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