Plan 9 is an operating system (OS) with some new perspectives and features from the original developers of Unix, who worked at AT&T Bell Labs, and then Lucent Technologies. It continues the main Unix ideas and takes them to their logical conclusions. It has been fully open source since the 4th Edition release.
A port of the Plan 9 kernel to run as a user space program using the vx32 sandboxing library in *BSD, Linux, and OS X systems.
An introduction to writing C programs in the Plan 9 environment by Pietro Gagliardi.
News coverage of the Open Source release of the third edition of Plan 9.
Information about the Plan 9 and Inferno workshops, including proceedings, video and audio recordings, and other resources.
First International Workshop for Plan 9 and Inferno.
News, tips and articles about Plan 9 and Inferno.
General introduction to the system.
News, blogs, source code repositories and other resources for the Plan 9 and Inferno projects part of GSoC.
Documentation, tips, various software packages including ports of Unix software, and extra drivers for 3rd Edition.
Wikipedia article about Plan 9.
A port of many Plan 9 programs from their native Plan 9 environment to Unix-like operating systems.
Essay compares Plan 9 to Unix, parts of Plan 9 being implemented in Unix. From Eric S. Raymond's book The Art of Unix Programming.
A (friendly) fork of the Plan 9 operating system, including many new contributions and packages.
Technical paper abstract; link to main article, fee needed. Library Hi Tech; Emerald Group.
A workshop for researchers and developers working on Plan 9 from Bell Labs, Inferno, and related ideas and projects.
Essay on the mail interface system by David L. Presotto. Available in PDF and PostScript format.
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