Dos

DOS is a family of operating systems for x86-based computers, most commonly IBM PC-compatibles.

DOS may also refer to:

Computing

Data over signalling, a telecommunications method for multiplexing data onto a signalling channel
Denial-of-service attack (DoS), a form of attack on a computer system or network
Disk operating system, software in most computers that allows for management of the storage devices
- List of disk operating systems
Distributed object system
Distributed operating system
DOS/360, an IBM mainframe operating system

Canal Nou Dos, the second channel launched by Ràdio Televisió Valenciana
Castlevania: Dawn of Sorrow, a 2005 video game for the Nintendo DS
Dawn of Souls, a 2004 remake of two first games of the Final Fantasy series on Game Boy Advance
The Hobbit: The Desolation of Smaug, a 2013 epic fantasy adventure film directed by Peter Jackson

Democratic Opposition of Serbia, a former multi-party political alliance in Serbia
Department of Space, an Indian government department responsible for administration of the Indian space programme
Deutscher Olympischer Sportbund
Directorate of Overseas Surveys, the United Kingdom's central survey and mapping organisation for British colonies and protectorates 1957–1984
United States Department of State, the Cabinet-level agency in charge of the foreign affairs of the United States

Density of states, a property in condensed matter physics
Dioctyl sebacate, an organic chemical commonly used as a plasticizer
Diversity oriented synthesis, a strategy to improve the efficiency of chemical synthesis
DOS, a designation for a series of Russian manned space stations, such as the Salyut program