=== Plan 9 ===
  * outer space [[wp>Plan 9 from Outer Space]]
  * user space http://swtch.com/plan9port/
  * bell labs http://plan9.bell-labs.com/plan9/
  * current incarnation http://www.vitanuova.com/inferno/

=== other plans... ===
  * [[wp>Plan 9 (disambiguation)]]