Maintenance operating systems
10 entries marked maintenance.
| Name | Years | Status | Family | Creator / origin |
|---|---|---|---|---|
| Burroughs MCPClearPath MCP | 1961– | Maintenance | MCP | Burroughs → Unisys |
| GCOSGECOS, General Comprehensive Operating System | 1962– | Maintenance | Independent | GE → Honeywell → Bull |
| OpenVMSVMS | 1977– | Maintenance | VMS | DEC → VSI |
| HP-UX | 1983– | Maintenance | Unix | HP |
| AmigaOS | 1985– | Maintenance | Independent | Carl Sassenrath / Commodore |
| RISC OS | 1987– | Maintenance | Independent | Acorn → RISC OS Open |
| Solaris | 1992– | Maintenance | Unix | Sun Microsystems → Oracle |
| FreeDOS | 1994– | Maintenance | DOS | Jim Hall & community |
| webOS | 2009– | Maintenance | Linux | Palm → HP → LG |
| ArcaOS | 2017– | Maintenance | OS/2 | Arca Noae |