Plan 9

Plan 9 or Plan Nine may refer to:

Music

 * Plan 9 (band), a psychedelic rock band from Rhode Island
 * Plan 9, an album by Big Guitars From Memphis with Rick Lindy
 * "Plan 9", a song on the 1993 album Gorgeous by electronica band 808 State
 * "Plan 9 Channel 7", a song on the 1979 album Machine Gun Etiquette by punk group The Damned
 * Plan 9 Records, an independent record label that was owned by Glenn Danzig of Misfits

Other uses

 * Plan 9 (2015 film), an independent 2015 film as a parody remake of the original
 * Plan 9 from Bell Labs, an operating system developed by Bell Laboratories as Unix's successor
 * Plan 9 from User Space, a port of many Plan 9 from Bell Labs libraries and applications to Unix-like operating systems
 * 9P (protocol), a network protocol developed as part of Plan 9 from Bell Labs sometimes referred to as Plan 9 Filesystem Protocol
 * Plan 9 from Outer Space, a 1959 science fiction film directed by Ed Wood, Jr.
 * Plan 9 from Outer Space (video game), based on the film
 * Plan Nine Publishing
 * Breaking Benjamin, who went by "Plan 9" during 1999