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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.
Systems architecture depends heavily on practices and techniques which were developed over thousands of years in many other fields, perhaps the most important being civil architecture. Prior to the advent of digital computers, the electronics and other engineering disciplines used the term "system" as it is still commonly used today.
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.
The definition of "open system" can be said to have become more formalized in the 1990s with the emergence of independently administered software standards such as The Open Group's Single UNIX Specification. Although computer users today are used to a high degree of both hardware and software interoperability, in the 20th century the open ...
The first documented computer architecture was in the correspondence between Charles Babbage and Ada Lovelace, describing the analytical engine.While building the computer Z1 in 1936, Konrad Zuse described in two patent applications for his future projects that machine instructions could be stored in the same storage used for data, i.e., the stored-program concept.
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 ...
It is based on the experience of leading developers of the Unix operating system. Early Unix developers were important in bringing the concepts of modularity and reusability into software engineering practice, spawning a "software tools" movement. Over time, the leading developers of Unix (and programs that ran on it) established a set of ...