- "Android":
  - "AND"
  - "CYN"
  - "FIR"
  - "REM"
  - "RZD"
  - "MLD"
  - "MCD"
  - "YNS"
- "AmigaOS":
  - "AMG"
  - "MOR"
- "Apple TV":
  - "ATV"
- "BlackBerry":
  - "BLB"
  - "QNX"
- "Brew":
  - "BMP"
- "BeOS":
  - "BEO"
  - "HAI"
- "Chrome OS":
  - "COS"
- "Firefox OS":
  - "FOS"
  - "KOS"
- "Gaming Console":
  - "WII"
  - "PS3"
- "Google TV":
  - "GTV"
- "IBM":
  - "OS2"
- "iOS":
  - "IOS"
- "RISC OS":
  - "ROS"
- "GNU/Linux":
  - "LIN"
  - "ARL"
  - "DEB"
  - "KNO"
  - "MIN"
  - "UBT"
  - "KBT"
  - "XBT"
  - "LBT"
  - "FED"
  - "RHT"
  - "VLN"
  - "MDR"
  - "GNT"
  - "SAB"
  - "SLW"
  - "SSE"
  - "CES"
  - "BTR"
  - "SAF"
  - "ORD"
  - "TOS"
- "Mac":
  - "MAC"
- "Mobile Gaming Console":
  - "PSP"
  - "NDS"
  - "XBX"
- "Real-time OS":
  - "MTK"
  - "TDX"
- "Other Mobile":
  - "WOS"
  - "POS"
  - "SBA"
  - "TIZ"
  - "SMG"
  - "MAE"
- "Symbian":
  - "SYM"
  - "SYS"
  - "SY3"
  - "S60"
  - "S40"
- "Unix":
  - "SOS"
  - "AIX"
  - "HPX"
  - "BSD"
  - "NBS"
  - "OBS"
  - "DFB"
  - "SYL"
  - "IRI"
  - "T64"
  - "INF"
- "WebTV":
  - "WTV"
- "Windows":
  - "WIN"
- "Windows Mobile":
  - "WPH"
  - "WMO"
  - "WCE"
  - "WRT"
  - "WIO"