UNIX CERTIFICATION..... referenced
Unix
From Wikipedia, the free encyclopedia
http://en.wikipedia.org/wiki/Unix
"Unix (officially trademarked as UNIX, sometimes also written as Unix) 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, Steven Gladstone 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[1] 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 and AIX.
Among all variants of Unix, Linux is the most widely used, powering
everything from huge data centers to desktop systems to mobile phones to
embedded devices such as routers. Mac OS X currently has the biggest use on
personal computers with more than 55 million systems installed. 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 a Unix or an operating system
that has the characteristics of either Version 7 Unix or UNIX System V.
Several graphical operating systems, including MacOS X and Android, can be
referred to as UNIX-like. ...... "
IN FULL .....
http://en.wikipedia.org/wiki/Unix
gerald philly pa usa
http://linuxducks.webs.com/
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