| Acronym | Definition |
|---|
| OT➣Off Topic (newsgroups, message boards, etc.) |
| OT➣Old Testament |
| OT➣Occupational Therapy |
| OT➣Overtime |
| OT➣Other |
| OT➣On Topic |
| OT➣Over the Top |
| OT➣Offensive Tackle (football) |
| OT➣Occupational Therapist |
| OT➣On Tour |
| OT➣On Target |
| OT➣Over There |
| OT➣Outlined (graphic design) |
| OT➣One Time (action code) |
| OT➣Operación Triunfo |
| OT➣Out of Town |
| OT➣Open Top (holster) |
| OT➣Open Top |
| OT➣Old-Timer |
| OT➣Operational Technology |
| OT➣Occupied Territory |
| OT➣Ordinary Time (Catholicism) |
| OT➣Online Teacher (education) |
| OT➣Open Type (font format) |
| OT➣Ortsteil (German: Locality) |
| OT➣Original Trilogy (Star Wars) |
| OT➣Oxytocin |
| OT➣Oregon Trail |
| OT➣Oil Tank |
| OT➣Overtone |
| OT➣Operating Thetan (Scientology) |
| OT➣Output Transformer (electronics) |
| OT➣Operation Team (various organizations) |
| OT➣Other Transactions |
| OT➣Oliver Twist |
| OT➣Oil Tempered (chemical process) |
| OT➣Order Type (mathematics) |
| OT➣Old Tappan (New Jersey) |
| OT➣Optimality Theory (linguistics) |
| OT➣Oral Testimony |
| OT➣Open Transport (networking) |
| OT➣Operating Time |
| OT➣Over Travel |
| OT➣Object Technology |
| OT➣Operation Theater |
| OT➣Organizational Training (Process Area; Capability Maturity Model Integration) |
| OT➣Off Treatment (cancer) |
| OT➣Overseas Territory |
| OT➣Osmium Tetroxide |
| OT➣Order Taker |
| OT➣Optical Telescope |
| OT➣Omni-Tek (Anarchy Online gaming faction) |
| OT➣Ohne Text (German: No Text content) |
| OT➣Overtemperature |
| OT➣Original Trainer (Pokemon) |
| OT➣Office of Telecommunications |
| OT➣Onegai Teacher (anime) |
| OT➣Orientation Tour |
| OT➣Off-Tank (gaming) |
| OT➣Optical Transceiver |
| OT➣Obstructing Traffic (traffic law) |
| OT➣Oberer Totpunkt (German: Top Dead Center) |
| OT➣Ouachita Trail |
| OT➣Orquesta Típica (Spanish: Typical Orchestra) |
| OT➣Observing Tool |
| OT➣Office Terminal (GTE) |
| OT➣Ownership Transition |
| OT➣Observer Trainer (military exercises) |
| OT➣Opportunity Taken |
| OT➣Observer-Target |
| OT➣Okinawa-Te (martial art style) |
| OT➣Optical Tracker |
| OT➣Orascom Telecom Holding SAE (stock symbol) |
| OT➣The Overthere (Everquest) |
| OT➣Oregon Trunk Railway |
| OT➣New York to Netherlands West Indies (routing designation; US Navy) |
| OT➣Orchestra Toronto (Canada) |
| OT➣Organisasi Terlarang (Indonesian: prohibited organization) |
| OT➣Operational Threshold |
| OT➣Original Tracing |
| OT➣Optical Transponder |
| OT➣Orbital Telescope |
| OT➣Operational Test/ing |
| OT➣Ortho Technician |
| OT➣Optical Translator |
| OT➣Optical Terminator (O/E Land, Inc) |
| OT➣Otelco Telecommunications LLC |
| OT➣Officer Trainee/Training |
| OT➣Curaçoa to Trinidad (routing designation; US Navy) |
| OT➣Aruba or Curaçoa to Northwest Africa (routing designation; US Navy) |
| OT➣(USN Rating) Ocean Systems Technician |
| OT➣Osservatorio Astronomico de Torino (Italian) |