UNIX is a computer operating system developed by AT & T Bell Labs in the 1960s and 1970s. UNIX operating system designed as a portable, multi-tasking and multi-user. BSD is a derivative (variant) of Unix developed by the University of California, Berkeley.
Unix operating system is widely used both as a server or workstation. Unix architecture and model client / server is the most important element in the development of the Internet and change the computing process is centralized in the network from a single process on the computer. Linux, an operating system adapted from Unix and is available for free have the popularity as an alternative to proprietary operating systems like Microsoft Windows History
In 1960, Massachusetts Institute of Technology, AT & T Bell Labs, and General Electric to work in an operating system called Multics eksprimental (Multiplexed Information and Computing System)
Applications
Many applications in other operating systems that originally born in the Unix operating system environment. One example of such applications are referred to gnuplot.
UNIX is an operating system developed by many parties. Any party that developed UNIX, adding to his technology in UNIX, which although it was outside the standard, capable of making the UNIX operating system is stronger or more reliable. The following tables list various types of UNIX.

Here are the names of the UNIX variants and developers (vendors / organizations):
A / UX : Apple Computer
Domain / X : Apple Computer
Darwin : Apple Computer (modifications made by Apple from the BSD kernel and applied to the Mac OS / X).
CTIX : Convergent Technology
Distrix : Convergent Technology
UniCOS: Cray Research (now part of Silicon Graphics Incorporated)
DG / UX: Data General Corporation
Digital UNIX: Digital Equipment Corporation (DEC) (bought by Compaq, now part of Hewlett-Packard)
Ultrix: Digital Equipment Corporation (DEC) (bought by Compaq. Now part of Hewlett-Packard)
Clix:Fairchild Company
Tru64:Compaq
AIX: International Business Machine (IBM) Corporation
Coherent: Mark William Company
XENIX: Microsoft Corporation
DVIX: Northern Telecom
UnixWare: Novell Incorporated
SCO UNIX: Santa Cruz Operation (SCO) Corporation
SCO XENIX: Santa Cruz Operation (SCO) Corporation
SCO OpenServer: Santa Cruz Operation (SCO) Corporation
Dynix :Sequent
SINIX:Siemens Corporation/Nixdorf
IRIX: Silicon Graphics Incorporated (SGI)
SunOS: Stanford Universities Network (SUN)
Solaris: Sun Microsystems Incorporated
Eunice: The Wollongong Group
Uniplus+: Unisoft Corporation
BSD UNIX: University of California Berkeley, USA
BSD/I :BSDI (Berkeley Software Design Incorporated)
OSF/1: Open Software Foundation
GNU/Linux: Free Software Foundation
GNU/Hurd: Free Software Foundation
FreeBSD
NetBSD
OpenBSD
NextStep
Minix :Open University Amsterdam (Vrije Universiteit Amsterdam), Netherlands
Mach: Carnegie Mellon University, United States
UNIX :System V Lucent Technologies (Bell Labs)
QNX: Software Systems QNX