/sys/doc/ Documentation archive

Plan 9 from Bell Labs

Plan 9 is a distributed research operating system developed at Bell Labs by the same team that created Unix and C. Over the years there have been four major releases or ‘Editions’; after the Fourth Edition the project adopted a ‘open source’ model and changes are published daily in a public repository.

Here is a mirror of the papers describing the system, including components from past ‘Editions’ that while not maintained anymore might be of historical interest.

See also