What Does UNIX 03 Mean?

UNIX 03 is an Open Group Specification first appearing in 2002, which was later approved in 2003. It is comprised of the IEEE portable operating system interface for Unix (POSIX) and Single UNIX Specification, version 3. UNIX 03 is the most recent update to the UNIX product standard family since 1997.


Techopedia Explains UNIX 03

UNIX is an OS formulated in 1969 at Bell Labs as an interactive time-sharing system. It was never a proprietary OS and is not owned by either of the leading computer companies. UNIX also is written in a standard language and is comprised of many popular ideas, which led UNIX to become the primary available open standard OS.


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Margaret Rouse

Margaret Rouse is an award-winning technical writer and teacher known for her ability to explain complex technical subjects to a non-technical, business audience. Over the past twenty years her explanations have appeared on TechTarget websites and she's been cited as an authority in articles by the New York Times, Time Magazine, USA Today, ZDNet, PC Magazine and Discovery Magazine.Margaret's idea of a fun day is helping IT and business professionals learn to speak each other’s highly specialized languages. If you have a suggestion for a new definition or how to improve a technical explanation, please email Margaret or contact her…