| O/T | Oil Tanker 
| Others |
| o/t | Other Times
| Others |
| OT | DITA Open Toolkit
| Others |
| OT | Object Type
| Others |
| OT | Objective test
| Others |
| OT | Observing Tool
| Others |
| OT | Obsolete Thinking
| Others |
| OT | Occlusion Time
| Others |
| OT | Occult Truth
| Others |
| OT | Occupancy Threshold
| Others |
| OT | Occupational Therapist
| Others |
| OT | Occupational Therapy
| Others |
| OT | Occupational Transfer
| Others |
| OT | Of Time
| Others |
| OT | Off Theme
| Others |
| OT | Offensive Tackle
| Others |
| OT | Office of Transportation
| Others |
| OT | Office Tower
| Others |
| OT | Officer Trainee
| Others |
| OT | Official Translation
| Others |
| OT | Ohne Themenbezug
| Others |
| OT | Oklahoma and Texas
| Others |
| OT | Oklahoma Territory
| Others |
| OT | Old Technology
| Others |
| OT | Old Testament
| Others |
| OT | Old Thread
| Others |
| OT | Old Time
| Others |
| OT | Old Timer
| Others |
| OT | Old Tools
| Others |
| OT | Old Town
| Others |
| OT | Old Trafford
| Others |
| OT | Old Tuberculin
| Others |
| OT | Olfactory Threshold
| Others |
| OT | Omega Team
| Others |
| OT | Omeprazole Test
| Others |
| OT | On Target
| Others |
| OT | On Tings
| Others |
| OT | On Topic
| Others |
| OT | One Thrown
| Others |
| OT | One Time
| Others |
| OT | One True
| Others |
| OT | Only This
| Others |
| OT | Only Topic
| Others |
| OT | Only Trilogy
| Others |
| OT | Open Target
| Others |
| OT | Open Top
| Others |
| OT | Open Topic
| Others |
| OT | Open Tracheostomy
| Others |
| OT | Open Transport
| Others |
| OT | Open Trapdoor
| Others |
| OT | Operating Theater
| Others |
| OT | Operating Thetan
| Others |
| OT | Operating Time
| Others |
| OT | Operational Instrumentation MDM (Manipulator Deployment Mechanism) -Tank
| Others |
| OT | Operational Technology
| Others |
| OT | Operational Test
| Others |
| OT | Operational Test(ing)
| Others |
| OT | Operational Trajectory
| Others |
| OT | Operations and Training
| Others |
| OT | Operations Technology
| Others |
| OT | Operator Terminal
| Others |
| OT | Opportunistic Tessa
| Others |
| OT | Opportunities and Threats
| Others |
| OT | Opportunity Transfer
| Others |
| OT | Optic Tract
| Others |
| OT | Optical Tracker
| Others |
| OT | Optical Transient
| Others |
| OT | Option Taken
| Others |
| OT | Oral Tolerance
| Others |
| OT | Orange Thing
| Others |
| OT | Orange Tip
| Others |
| OT | Ordinanza Telegrafica
| Others |
| OT | Oregon Territory
| Others |
| OT | Organizational Training
| Others |
| OT | Original Trainer
| Others |
| OT | Original Transcription
| Others |
| OT | Original Trilogy
| Others |
| OT | Originating Topic
| Others |
| OT | Orphan Trader
| Others |
| OT | Orthopaedic Treatment
| Others |
| OT | Orthostatic Tremor
| Others |
| OT | Other Tenants
| Others |
| OT | Other Terms
| Others |
| OT | Other Things
| Others |
| OT | Other Topic
| Others |
| OT | Other Torts
| Others |
| OT | Our Town
| Others |
| OT | Out of Tune
| Others |
| OT | Out Temperature
| Others |
| OT | out The
| Others |
| OT | Outdoor Track
| Others |
| OT | Outer Tracker
| Others |
| OT | outlays in the
| Others |
| OT | Over Technical
| Others |
| OT | Over Time
| Others |
| OT | Over Top
| Others |
| OT | Overflow Threshold
| Others |
| OT | Overload Time
| Others |
| OT | Overtime
| Others |
| OT | Overtime Time
| Others |
| OT | Oxytocin
| Others |