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Unix (/ ˈ j uː n ɪ k s / ⓘ, 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. [4]
A Unix architecture is a computer operating system system architecture that embodies the Unix philosophy. It may adhere to standards such as the Single UNIX Specification (SUS) or similar POSIX IEEE standard. No single published standard describes all Unix architecture computer operating systems — this is in part a legacy of the Unix wars.
Registered as Unix 93 “single and Multi-processor Industry Standard Intel architecture platform”. z/OS : z/OS by IBM is listed as two different operating systems, z/OS and z/OS V2R1. Both are Unix 95.
By that year Unix or a Unix-like system was available for at least 16 different processors and architectures from about 60 vendors; BYTE noted that computer companies "may support other [operating] systems, but a Unix implementation always happens to be available", [14] [20] [36] and that DEC and IBM supported Unix as an alternative to their ...
A kernel is a component of a computer operating system. [1] A comparison of system kernels can provide insight into the design and architectural choices made by the developers of particular operating systems.
The relevant term is of the porting target is computer architecture; it comprises the instruction set(s) and the microarchitecture(s) of the processor(s), at least of the CPU. The target also comprises the "system design" of the entire system, be it a supercomputer , a desktop computer or some SoC , e.g. in case some unique bus is being used.
On BSD systems, commonly a symlink to the kernel sources in /usr/src/sys. /tmp: A place for temporary files not expected to survive a reboot. Many systems clear this directory upon startup or use tmpfs to implement it. /unix: The Unix kernel in Research Unix and System V. [14] With the addition of virtual memory support to 3BSD, this got ...
A monolithic kernel is an operating system architecture with the entire operating system running in kernel space. The monolithic model differs from other architectures such as the microkernel [1] [2] in that it alone defines a high-level virtual interface over computer hardware.