This is a list of disk operating systems with the acronym DOS as part of the name (e.g., TRSDOS for the TRS-80 line of computers). Many are (or were in the day) called simply DOS within the context of their respective user communities. In the case of MS-DOS, its ubiquitousness as the operating system for IBM PC compatibles, prior to Windows 95, caused DOS to be widely used as a synonym for MS-DOS.
For IBM PC compatible systems
In chronological order of release: IBM PC DOS (1981), operating system developed by Microsoft based on 86-DOS MS-DOS, Microsoft's rebranded version sold under its own name. MS-DOS and IBM PC DOS were almost identical until PC DOS version 6. DR-DOS (1988), MS-DOS-compatible operating system originally developed by Digital Research ROM-DOS (1989), MS-DOS clone by Datalight PTS-DOS (1993), MS-DOS clone developed in Russia by PhysTechSoft FreeDOS (1994), open source MS-DOS clone MiniVMDOS MiniVMDOS (2025), MS-DOS, PC-DOS, DR-DOS compatible system developed by PTSource PTSource LiberDOS LiberDOS (2026), MS-DOS compatible system developed by LiberSoft LiberSoft
For other x86 systems In alphabetical order:
86-DOS (a.k.a. QDOS, created 1980), an operating system developed by Seattle Computer Products for its 8086-based S-100 computer kit, heavily inspired by CP/M Concurrent DOS (a.k.a. CDOS, Concurrent PC DOS and CPCDOS) (since 1983), a CP/M-86 and MS-DOS 2.11 compatible multiuser, multitasking DOS, based on Concurrent CP/M-86 developed by Digital Research DOS Plus (since 1985), a PC DOS and CP/M-86 compatible multitasking operating system for early x86-based personal computers, based on Concurrent PC DOS 4.1/5.0 by Digital Research Multiuser DOS (a.k.a. MDOS), a PC DOS and CP/M-86 compatible multiuser multitasking operating system based on Concurrent DOS by Digital Research NetWare PalmDOS, a successor of DR DOS 6.0 specifically tailored for early mobile and palmtop PCs by Novell Novell DOS, a multitasking successor of DR DOS 6.0 by Novell OpenDOS, a successor of Novell DOS by Caldera
For Atari 8-bit computers In alphabetical order:
Atari DOS, from Atari, Inc. DOS XL, from Optimized Systems Software MyDOS SmartDOS SpartaDOS SpartaDOS X TOP-DOS Turbo-DOS
For other platforms In alphabetical order:
AmigaDOS, disk operating system portion of AmigaOS AMSDOS, for Amstrad CPC compatibles ANDOS, for the Russian Electronika BK Apple DOS, for the Apple II series from late 1978 through early 1983 Apple ProDOS, name for both ProDOS 8 for the Apple II and ProDOS 16 for the Apple IIGS Commodore DOS, for Commodore's 8-bit computers Cromemco DOS (CDOS), a CP/M-like operating system CSI-DOS, for the Soviet Elektronika BK computers DOS (Diskette Operating System), a small OS for 16-bit Data General Nova computers, a cut-down version of their RDOS. DEC BATCH-11/DOS-11, the first operating system to run on the PDP-11 minicomputer Delta DOS, third party option from Premier Microsystems for the Dragon 32/64 DIP DOS, the operating system of the Atari Portfolio DOS/360, 1966 IBM System/360 mainframe computer Disk Operating System DragonDOS, for the Dragon 32/64 GEMDOS, one of the components of Atari TOS HDOS, for Heathkit computers IDOS, for the Ivel Ultra Apple II clone IS-DOS, for Russian ZX Spectrum clones, developed in 1990 or 1991 IMDOS, for IMSAI 8080 MasterDOS, replacement DOS for the SAM Coupé MDOS (Micropolis DOS) for S-100 MDOS, Myarc Disk Operating System for the Geneve 9640 MSX-DOS, a cross between MS-DOS 1.0 and CP/M developed by Microsoft for the MSX computer standard NewDos/80, third-party option for the TRS-80 Oric DOS, for the Oric-1 PTDOS, for the 1970s Sol-20 from Processor Technology QDOS, for the Sinclair QL SAMDOS, for the SAM Coupé SDOS, for the SWTPC 6800 RDOS, for the Data General Nova and Eclipse minicomputers SK*DOS, for Motorola 68000-based systems TR-DOS, for the ZX Spectrum TRSDOS, for the TRS-80 Xtal DOS for the Tatung Einstein
See also DOS (disambiguation)
References