DOS is also a subsystem of OS/2, running in cohabitation with version 1.x of OS/2 and as a task in version 2 and later. Furthermore DOS is also used as a collective name for a variety of operating systems that offer compatibility with the PC DOS system to varying degrees.
This lists major DOS operating system products by several companies.
- Digital Research (DRI) branch
- DR DOS
- Novell DOS
- Caldera OpenDOS
- Caldera DR-DOS
- Lineo DR-DOS
- DeviceLogics DR-DOS 8.1
- PC DOS, IBM DOS
- Lifeboat Associates
- SB-86 - Software Bus-86
- Microsoft (MS)
- Seattle Computer Products (SCP)
- XDOS Family
- XDOS (1988)
- NSSDOS (1989)
- DOSC-C/Free-DOS/FreeDOS (1994)
Operating Systems with DOS Support
As above, only major or notable versions included.
- IBM OS/2 Standard Edition 1.0, Extended Edition 1.0
- IBM OS/2 Standard Edition 1.1, Extended Edition 1.1
- IBM OS/2 Standard Edition 1.2, Extended Edition 1.2
- IBM OS/2 Standard Edition 1.2, Extended Edition 1.3
- Microsoft Windows 95
- Microsoft Windows 98
- Microsoft Windows 98 Second Edition
- Microsoft Windows ME
Software that runs on top of DOS and takes over the operation of the machine to varying degrees.