title: System 9
text: # System 9
  
  System 9 or System IX may refer to:
  
  ## Computing
  
  * IBM System z9, the mainframe line
  * Plan 9 from Bell Labs, the operating system
  * Mac OS 9, latest release of Classic Mac OS operating system
  * OS-9, the Unix-like real time operating system
  * SYSTEM POWER 9, line of power supplies by be quiet!
  
  ## Other
  
  * STS-9 (Space Transportation System-9), the Space Shuttle mission
  