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Template:/box-header Unix (trademarked as UNIX) is a family of multitasking, multiuser computer operating systems that derive from the original AT&T Unix, developed in the 1970s at the Bell Labs research center by Ken Thompson, Dennis Ritchie, and others.

Initially intended for use inside the Bell System, AT&T licensed Unix to outside parties from the late 1970s, leading to a variety of both academic and commercial variants of Unix from vendors such as the University of California, Berkeley (BSD), Microsoft (Xenix), IBM (AIX) and Sun Microsystems (Solaris). AT&T finally sold its rights in Unix to Novell in the early 1990s, which then sold its Unix business to the Santa Cruz Operation (SCO) in 1995, but the UNIX trademark passed to the industry standards consortium The Open Group, which allows the use of the mark for certified operating systems compliant with the Single UNIX Specification (SUS). Among these is Apple's OS X, which is the Unix version with the largest installed base as of 2014.

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The history of Unix dates back to the mid-1960s when the Massachusetts Institute of Technology, AT&T Bell Labs, and General Electric were jointly developing an experimental time sharing operating system called Multics for the GE-645 mainframe. Multics introduced many innovations, but had many problems. Bell Labs, frustrated by the size and complexity of Multics but not the aims, slowly pulled out of the project. Their last researchers to leave Multics, Ken Thompson, Dennis Ritchie, Doug McIlroy, and Joe Ossanna among others, decided to redo the work on a much smaller scale. In the late 1960s, Bell Labs was involved in a project with MIT and General Electric to develop a time-sharing system, called Multiplexed Information and Computing Service (Multics), allowing multiple users to access a mainframe simultaneously. Dissatisfied with the project's progress, Bell Labs management ultimately withdrew.

Lynne Greer Jolitz (born June 30, 1961) is a figure in free software and founded many startups in Silicon Valley with her husband William. Lynne Jolitz is probably most famous for her work in pioneering open source operating systems with 386BSD with her husband. She has founded startup companies that involve workstations to companies in Internet multimedia. Lynne is also a noted author and authority on operating systems and networking issues. Lynne is an internet news media commentator discussing events in the computer industry and wrote frequently for BYTE. She also holds patents in internet technologies and semiconductor memory innovations, and writes technical papers and articles. She is currently an adviser to CoolClip network, an internet startup that uses the server-based video production engine that Lynne originally designed and tested at the University of California, Berkeley. Lynne has appeared on the Oracle E-Business Network and was presented with their Geek of the Week award for her years of work in high-speed networking and operating systems design. Lynne also has appeared on Dvorak’s RealComputing discussing the impact of Internet broadband.

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