Plan 9
Operating system
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Plan 9 from Bell Labs is a distributed operating system which originated from the Computing Science Research Center at Bell Labs in the mid-1980s and built on UNIX concepts first developed there in the late 1960s. Since 2000, Plan 9 has been free... Wikipedia
Developer: Nokia Bell Labs, Rob Pike, Ken Thompson, and more
Initial release date: July 5, 2003
License: 2021: MIT; 2014: GPL-2.0-only; 2002: LPL-1.02; 2000: Plan 9 OSL
Source model: Open source