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Plan 9
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Plan 9 was developed at Bell Labs
(the research division of Lucent Technologies).
In July 2000 the 3rd Edition was released as Open Source, and this is was quickly made available by Vita Nuova
in the form of a bootable CD. The 4th Edition was released by Bell Labs in April 2002 and Vita Nuova is now shipping 4th Edition Boxed Sets and CDs.
Since 2002, the system has been updated by an on-line update system unique to Plan 9.
The developers of plan 9 include some of the original Unix designers including Rob Pike and
Dennis Richie.
To the end user, Plan 9 bears a superficial resemblance to Unix, but the underlying operating system
is very different. In particular, Plan 9 was designed as a network operating system, as opposed
to Unix where networking support was added as an afterthought. Some of the standard Unix tools are available, but they have generally been either
enhanced or completely rewritten.
Plan 9 has been ported to a number of architectures, including Intel x86, Sparc, Alpha, Power PC, and Arm.
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