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In multitasking operating systems, processes (running programs) need a way to create new processes, e.g. to run other programs. Fork and its variants are typically the only way of doing so in Unix-like systems. For a process to start the execution of a different program, it first forks to create a copy of itself.
NeoOffice, a fork of OpenOffice.org, with an incompatible license (GPL rather than LGPL), due to disagreements about licensing and about the best method to port OpenOffice.org to Mac OS X. The Safari renderer that became WebKit, from KHTML. sK1, from Skencil when the latter moved from Tk to GTK+. WordPress, from b2/CafeLog. Zen Cart, from ...
The OS was reported to include a time-sliced scheduler and interprocess communication via pipes and shared memory. This limited form of multitasking was considered to be more useful in a server rather than workstation environment, particularly coupled with MS-Net 2.0, which was released simultaneously.
Preemptive multitasking was implemented in the PDP-6 Monitor and Multics in 1964, in OS/360 MFT in 1967, and in Unix in 1969, and was available in some operating systems for computers as small as DEC's PDP-8; it is a core feature of all Unix-like operating systems, such as Linux, Solaris and BSD with its derivatives, [7] as well as modern ...
Army Secure Operating System (ASOS) [40] – TCSEC A1-class secure, real-time OS for Ada applications; EPOC (EPOC16) NeXTSTEP (1.0) OS/2 (1.2) RISC OS (First release was to be called Arthur 2, but was renamed to RISC OS 2, and was first sold as RISC OS 2.00 in April 1989) SCO UNIX (Release 3) TSX-32; Version 10 Unix; Xenix 2.3.4 (Last stable ...
Forks and Joins: When a job arrives at a fork point, it is split into N sub-jobs which are then serviced by n tasks. After being serviced, each sub-job waits until all other sub-jobs are done processing. Then, they are joined again and leave the system.
This technique pertains to multitasking operating systems, and is sometimes called a subprocess or traditionally a subtask. There are two major procedures for creating a child process: the fork system call (preferred in Unix-like systems and the POSIX standard) and the spawn (preferred in the modern (NT) kernel of Microsoft Windows , as well as ...
μC/OS-II – a small pre-emptive priority based multi-tasking kernel; μC/OS-III – a small pre-emptive priority based multi-tasking kernel, with unlimited number of tasks and priorities, and round-robin scheduling; Cesium RTOS - commercial continuation of Micrium's μC/OS-III forked from the open-sources release