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Both Unix and the C programming language were developed by AT&T and distributed to government and academic institutions, which led to both being ported to a wider variety of machine families than any other operating system. The Unix operating system consists of many libraries and utilities along with the master control program, the kernel.
POSIX became the unifying standard for Unix systems (and some other operating systems). [46] Meanwhile, the BSD world saw its own developments. The group at Berkeley moved its operating system toward POSIX compliance and released a stripped-down version of its networking code, supposedly without any code that was the property of AT&T.
Dennis MacAlistair Ritchie (September 9, 1941 – c. October 12, 2011) was an American computer scientist. [3] He created the C programming language and the Unix operating system and B language with long-time colleague Ken Thompson. [3]
Eventually, the tools developed by Thompson became the Unix operating system: Working on a PDP-7, a team of Bell Labs researchers led by Thompson and Ritchie, and including Rudd Canaday, developed a hierarchical file system, the concepts of computer processes and device files, a command-line interpreter, pipes for easy inter-process ...
The Unix operating system was developed at AT&T Bell Laboratories in the late 1960s, originally for the PDP-7, and later for the PDP-11. Because it was essentially free in early editions, easily obtainable, and easily modified, it achieved wide acceptance.
Below are other certified Unix operating systems: [4] macOS: Heavily based on BSD, macOS is registered as certified Unix 03 brand on both versions (Intel and Apple silicon-based). SCO OpenServer: Another operating system by SCO. Registered as Unix 93 “single and Multi-processor Industry Standard Intel architecture platform”.
DOS/360 (IBM's Disk Operating System) GEORGE 1 & 2 for ICT 1900 series; Mod 1 [7] Mod 2 [8] Mod 8 [9] MS/8 (Richard F. Lary's DEC PDP-8 system) MSOS (Mass Storage Operating System) [10] OS/360 (IBM's primary OS for its S/360 series) PCP and MFT (shipped) RAX; Remote Users of Shared Hardware (RUSH), a time-sharing system developed by Allen ...
UNIX Time-Sharing System v7 (It is from Version 7 Unix (and, to an extent, its descendants listed below) that almost all Unix-based and Unix-like operating systems descend.) Unix System III; Unix System IV; Unix System V. Unix System V Releases 2.0, 3.0, 3.2, 4.0, and 4.2; UNIX Time-Sharing System v8; UNIX Time-Sharing System v9; UNIX Time ...