Unix

Unix (officially trademarked as UNIX, sometimes also written as Unix in small caps) is a multitasking, multi-user computer operating system originally developed in 1969 by a group of AT&T employees at Bell Labs, including Ken Thompson, Dennis Ritchie, Brian Kernighan, Douglas McIlroy, Michael Lesk and Joe Ossanna. The Unix operating system was first developed in assembly language, but by 1973 had been almost entirely recoded in C, greatly facilitating its further development and porting to other hardware. Today's Unix system evolution is split into various branches, developed over time by AT&T as well as various commercial vendors, universities (such as University of California, Berkeley's BSD), and non-profit organizations.

The Open Group, an industry standards consortium, owns the UNIX trademark. Only systems fully compliant with and certified according to the Single UNIX Specification are qualified to use the trademark; others might be called Unix system-like or Unix-like, although the Open Group disapproves of this term. However, the term Unix is often used informally to denote any operating system that closely resembles the trademarked system.

During the late 1970s and early 1980s, the influence of Unix in academic circles led to large-scale adoption of Unix (particularly of the BSD variant, originating from the University of California, Berkeley) by commercial startups, the most notable of which are Solaris, HP-UX, Sequent, and AIX, as well as Darwin, which forms the core set of components upon which Apple's OS X, Apple TV, and iOS are based. Today, in addition to certified Unix systems such as those already mentioned, Unix-like operating systems such as MINIX, Linux, and BSD descendants (FreeBSD, NetBSD, OpenBSD, and DragonFly BSD) are commonly encountered. The term traditional Unix may be used to describe an operating system that has the characteristics of either Version 7 Unix or UNIX System V.

Read more about Unix:  Overview, History, Standards, Components, Impact, Branding

Other articles related to "unix":

Unix - Branding
... See also List of Unix systems In October 1993, Novell, the company that owned the rights to the Unix System V source at the time, transferred the trademarks of Unix to the X/Open Company (now The Open Group ... Unix vendor SCO Group Inc ... The present owner of the trademark UNIX is The Open Group, an industry standards consortium ...
CB UNIX
... Columbus UNIX (or CB UNIX) was, according to Marc Rochkind, a variant of the UNIX operating system internal to Bell Labs ... CB UNIX was developed to address deficiencies inherent in Research Unix, notably the lack of interprocess communication and file locking, considered essential for ... Several Bell System operation support system products were based on CB UNIX such as Switching Control Center System ...
Plotutils - History
... Several utilities were inspired by Unix plotting utilities ... A graph utility and various plot filters were present in the first releases of Unix from Bell Laboratories ... By the time of Version 7 Unix, `graph', `plot', `spline', and several device-dependent versions of `libplot' were a standard Unix features ...
Srm (Unix) - See Also
... rm (Unix) remove file in Unix ... data remanence shred (Unix) ...
Callan Data Systems - Unistar
... named Unistar using the Sun-1 board, which was based on the Motorola 68000 CPU, and which ran UNIX licensed from AT T ... chiefly of writing device drivers for the integrated system, based on the UNIX kernel, and integrating third-party applications for resale to customers ... were competing to build the first commercial UNIX workstations based on inexpensive microprocessor-based Multibus-single-board CPUs ...