- DOS stands for Date of Service (health insurance)
- DOS stands for Denial Of Service (attack)
- DOS stands for Department of Space (India)
- DOS stands for Department of Statistics
- DOS stands for Day of Show
- DOS stands for Density of States
- DOS stands for Department Of State (United States)
- DOS stands for Director of Security
- DOS stands for Distribution of States
- DOS stands for Director of Sales
- DOS stands for División de Organizaciones Sociales (Spanish: Division of Social Organizations; Chile)
- DOS stands for Department of Surgery
- DOS stands for Disk Operating System
- DOS stands for Division of Safety (various locations)
- DOS stands for Department of Shipping (various locations)
- DOS stands for Dean of Students
- DOS stands for Days of Supply (US DoD)
- DOS stands for Date Of Separation
- DOS stands for Director of Operations and Support
- DOS stands for Dosimeter
- DOS stands for Daughter of Satan
- DOS stands for Director of Emergency Services
- DOS stands for Disciplines of Study (UK)
- DOS stands for Degree of Saturation
- DOS stands for Department of Sanitation (New York City)
- DOS stands for Distributed Operating System
- DOS stands for Degree of Scattering
- DOS stands for Degree of Superiority (algorithm comparison)
- DOS stands for Division of Standards (Massachusetts)
- DOS stands for Directorate of Safety (various organizations)
- DOS stands for Deposition On Silicon
- DOS stands for Dead on Scene
- DOS stands for Declaration of Security
- DOS stands for Democratic Opposition of Serbia
- DOS stands for Directly Operated Stores
- DOS stands for Digital Operating System
- DOS stands for District Open Space (Hong Kong)
- DOS stands for Demokratska Opozicija Srbije (Democratic Opposition of Serbia; Coalition of Democratic Political Serbian Parties)
- DOS stands for District of Sechelt (Canada)
- DOS stands for Director of Ordnance Services (Australia)
- DOS stands for Distributed Object Server (Objectstream – SS7)
- DOS stands for Dozing Off Soon
- DOS stands for Dependents Overseas
- DOS stands for Direct Operating System
- DOS stands for Dreaded Orange Spots (soapmaking, indicates soap has gone rancid)
- DOS stands for Direction des Opérations de Secours
- DOS stands for Dad Over Shoulder
- DOS stands for Director Of Operations & Support
- DOS stands for Directionally Oriented Structures
- DOS stands for Date of Sobriety (recovery programs)
- DOS stands for Denver Orchid Society
- DOS stands for Date of Seeding
- DOS stands for Deutscher Orgon Service
- DOS stands for Daemons of Shadow (gaming)
- DOS stands for Deployed Operational State
- DOS stands for Denied Originating Service
- DOS stands for Distributed Open-Short (microwave theory)
- DOS stands for Dropout Studios
- DOS stands for Division of Operational Safety (US Atomic Energy Commission)
- DOS stands for Diis Omnibus Sacrum (Latin: Sacred to All the Gods, epigraphy)
- DOS stands for Designated Operator Service (SBC)
- DOS stands for Declaration of Safety
- DOS stands for Dementia Observation System (psychology)
- DOS stands for Data Overhead Switch (Nortel)
- DOS stands for District Office Study
- DOS stands for Densité d’Occupation des Sols (French: Density Land Use; France and Canada)
- DOS stands for Detachable Output Stream
- DOS stands for Duncan’s Outdoor Shop (Bay City, Michigan)
- DOS stands for Director of Study/Studies
DOS