- DO stands for Day Off
- DO stands for Data Out
- DO stands for Due Out
- DO stands for Delivery Order
- D/O stands for Disorder
- DO stands for District Office
- D/O stands for Daughter Of
- DO stands for Director of Operations
- DO stands for Driver Only (train operated by the driver only)
- DO stands for Direct Object
- DO stands for Duty Officer
- DO stands for Digital Output
- DO stands for Data Object
- DO stands for Design Overview
- DO stands for Development Officer
- DO stands for Director Officer
- DO stands for Dominican Republic
- DO stands for Disorder
- DO stands for Desk Officer (NYPD)
- DO stands for Dominica
- DO stands for Diário Oficial (Official Gazette; Brazil)
- DO stands for Distributed Object
- DO stands for District Officer
- DO stands for Dissolved Oxygen
- D/O stands for Delivery Order
- DO stands for Ditto
- DO stands for Division Officer
- DO stands for Dornier (German aircraft manufacturer)
- DO stands for Drawing Office
- DO stands for Doctor of Osteopathy
- DO stands for Doctor of Osteopathic Medicine
- DO stands for Detention Officer
- DO stands for Designated Official
- DO stands for Design Objective
- DO stands for Doctor of Obstetrics
- DO stands for Discrete Output
- DO stands for Distributed Operations
- DO stands for Deportation Order
- DO stands for Disaster Operations (US FEMA)
- DO stands for Departmental Offices
- DO stands for Denominacion de Origen (general identification for Spanish wines)
- DO stands for Disbursing Officer
- DO stands for Operations Directorate (NIMA)
- DO stands for Dispensing Optician
- DO stands for Directorate of Operations (US CIA)
- DO stands for Division Operator
- DO stands for Digital Orthophoto (FEMA)
- DO stands for Divisional Officer
- DO stands for Ombudsmannen mot Etnisk Diskriminering (the Swedish national ombudsman for issues on ethnic discrimination)
- DO stands for Diffractive Optics (camera lenses technology)
- D/O stands for Died Of
- DO stands for Determination Order (workers compensation claims)
- DO stands for Defense Order
- DO stands for Dommages Ouvrage (French: Work Damage)
- DO stands for Desktop Originator
- DO stands for Disciplined Oscillator
- D/O stands for Due-Out
- DO stands for District Overseer (Jehovah’s Witnesses)
- DO stands for Disbursement Order
- DO stands for Operational Dependability
- DO stands for Drift Orbit
- DO stands for DCS/Operations
- DO stands for Donk Out (poker)
- DO stands for Disbursing Order
- DO stands for Disto-Occlusal (dentistry)
- DO stands for Diode Outline
- DO stands for Distortion Offset
- DO stands for Dark One (Wheel of Time series)
- DO stands for Diatomic Orbital
- DO stands for Doctor of Otolaryngology
- DO stands for Defined Order
- DO stands for US Duty Officer
- DO stands for Daily Orange (Syracuse University student newspaper; New York)
- DO stands for Dawson and Oberman (plasmas)
D/O