Plan 9
Plan 9 is a historic distributed operating system from Bell Labs capabele of running on a heterogeneous network via inter-process communication. It became open source in 2000. On March 23, 2021, ownership of Plan 9 transferred from Bell Labs to the Plan 9 Foundation, and all previous releases have been relicensed to the MIT License.
Major software developers contributed to its development.
The motto of the system is: everything is a file. Subsystems can interface via device files and shared network filesystems. Plan 9 uses Unicode throughout the system.
Subsystems
[edit]The Plan 9 Filesystem Protocol (9P) is part of WSL, and the ChromeOS Linux container package.