DOS is shorthand for the MS-DOS and IBM PC DOS family of operating systems. DOS may also refer to:

Computing

* Data over signalling (DoS), multiplexing data onto a signalling channel * Denial-of-service attack (DoS), an attack on a communications network * Disk operating system ** List of disk operating systems, Apple DOS, Atari DOS, DOS/360, etc. * Distributed operating system

Music

Albums

* ''Dos'' (Altered State album) * ''Dos'' (Dos album) * ''Dos'' (Fanny Lú album) * ''Dos'' (Gerardo album) * ''Dos'' (Malo album), 1972 * ''Dos'' (Myriam Hernández album), 1989 * ''Dos'', album by Wooden Shjips, 2009 * '' ¡Dos!'', album by Green Day

Other uses in music

* Dos (band), an American band * DOS (concert), by Filipino singer Daniel Padilla

Organisations

* Democratic Opposition of Serbia, a former political alliance *

Department of Space The Department of Space is an Indian government department responsible for administration of the Indian space program. It manages several agencies and institutes related to space exploration and space technologies. The Indian space program und ...

, India * Deutscher Olympischer Sportbund * Directorate of Overseas Surveys, UK 1957–1984 *Dominus Obsequious Sororium, within cult NXIVM * United States Department of State

Places

* Dos, a village in Vidra Commune, Romania

Science

* Density of states in physics * DOS-1 etc., Russian space station designation in the Salyut programme * Dioctyl sebacate, an organic chemical * Diversity oriented synthesis in chemistry

Sports

* DOS Kampen, a Dutch football club * VV DOS, a past Dutch football club now part of FC Utrecht

Other uses

* Dos (card game), a variation of Uno * Dos, an Ancient Roman dowry * Day of Silence, an LGBT observance