Similar to HarmonyOS

• 

  ReactOS

  ReactOS
  
• 

  Redox (オペレーティングシステム)

  Redox (operating system)
  
• 

  RISC OS

  RISC OS
  
• 

  SerenityOS

  SerenityOS
  
• 

  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
  
• 

  Oberon

  Oberon (operating system)
  
• 

  Darwin (オペレーティングシステム)

  Darwin (operating system)
  
• 

  TempleOS

  TempleOS
  
• 

  DragonFly BSD

  DragonFly BSD
  
• 

  Haiku (オペレーティングシステム)

  Haiku (operating system)
  
• 

  Multics

  Multics
  
• 

  MINIX

  Minix
  
• 

  Linux Mint

  Linux Mint
  
• 

  組み込みオペレーティングシステム

  Embedded operating system
  
• 

  AudioOS

  AudioOS
  
• 

  Azure Sphere

  Azure Sphere
  
• 

  BitBake

  BitBake
  
• 

  BridgeOS

  BridgeOS
  
• 

  Cisco Internetworking Operating System

  Cisco IOS
  
• 

  Enea OSE

  Operating System Embedded