Similar to HarmonyOS

• 

  CP/M

  CP/M
  
• 

  CP/M-68K

  
• 

  CP/M-8000

  
• 

  CP/M-86

  CP/M-86
  
• 

  EmuTOS

  EmuTOS
  
• 

  EyeOS

  EyeOS
  
• 

  FreeDOS

  FreeDOS
  
• 

  Genode

  Genode
  
• 

  GNU

  GNU
  
• 

  GNU Hurd

  GNU Hurd
  
• 

  GNUの派生

  GNU variants
  
• 

  HelenOS

  HelenOS
  
• 

  JX (オペレーティングシステム)

  JX (operating system)
  
• 

  MiNT

  MiNT
  
• 

  MS-DOS

  MS-DOS
  
• 

  Pop! OS

  Pop! OS
  
• 

  ReactOS

  ReactOS
  
• 

  Redox (オペレーティングシステム)

  Redox (operating system)
  
• 

  RISC OS

  RISC OS
  
• 

  Solus

  Solus (operating system)
  
• 

  SteamOS

  SteamOS
  
• 

  Syllable

  Syllable Desktop
  
• 

  Version 6 Unix

  Version 6 Unix
  
• 

  Version 7 Unix

  Version 7 Unix
  
• 

  Xv6

  Xv6
  
• 

  AsteroidOS

  AsteroidOS
  
• 

  Ubuntu

  Ubuntu
  ▼-1 trends

  
• 

  OpenSolaris

  OpenSolaris