OD
- OD
- (i) Old Dragon
- Ordnance Datum (nautical charts)
- (p) Overdose
- ODAS – (a) OCA-DLR Asteroid Survey
- ODB
- (i) Ol' Dirty Bastard (rapper)
- (i) One Dirty B*tch/Broad/Babe (professional wrestler)
- (i) Operational Data Base
- (i) Original David Baker (professional poker player; used to distinguish from another professional poker player of the same name)
- (i) Oxford Dictionary of Byzantium
- ODBC – (i) Open DataBase Connectivity
- ODI
- (i) Office for Disability Issues (UK government agency)
- One Day International (cricket)
- Open Data-Link Interface
- Oracle Data Integrator
- Overseas Development Institute (UK think tank)
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