Oat (disambiguation)
- Antifreeze
- Avena
- Captain Oats (disambiguation)
- Carleton Oats
- Carpe Jugulum
- Francis Oats
- Israeli Military Governorate
- Nate Oats
- OATS
- Oat
- Oat Hills (disambiguation)
- Oat Mountain
- Oates (disambiguation)
- Oatmeal (disambiguation)
- Oats (horse)
- Oats Studios
- Obligation assimilable du Trésor
- Ohio Achievement Test
- Old Anatolian Turkish
- Omicron Alpha Tau
- Operational acceptance testing
- Optometry Admission Test
- Ornithine aminotransferase
- Outside air temperature
- Overseas Adventure Travel
- Oxford Aviation Training
- Scarborough Open Air Theatre
- Transition metal oxo complex
- Uniola paniculata