DOS
Timeline of DOS operating systems
List of disk operating systems called DOS
Comparison of DOS operating systems
Atari DOS
DOS/360 and successors
MS-DOS
DR-DOS
86-DOS
Multiuser DOS
VSE (operating system)
RMX (operating system)
DOS Protected Mode Interface
FlexOS
DOSBox
Data General RDOS
Iskra-1030
TRSDOS
OS4000
DOS Protected Mode Services
Marc McDonald
GEOS (16-bit operating system)
OS/2
GLaDOS
Batch file
CP/M
GEM (desktop environment)
LAN Manager
ISIS (operating system)
Atari Portfolio
GNU