OT
- OTA – (i) Office of Technology Assessment – (a/i) Orthodontic Technicians Association
- OTAC – (i) Orthodontic Technicians Association Conference – (i) Orthodontic Technicians Association Council
- OTB – (i) Off The Ball – (i) Offtrack Betting – (p) OneSAF Testbed (a descendant of ModSAF)
- OTC – (i) Over-The-Counter (drugs)
- OTEA – (i) (U.S. Army) Operational Test Evaluation Agency
- OTI – (i) Office of Transition Initiatives (United States Agency for International Development)
- OTO – (i) Ordo Templi Orientis (Latin, "Order of the Temple of the East", i.e. the Order of Oriental Templars)
- OTOH – (i) On The Other Hand
- OTSBH – (i) Over The Shoulder Boulder Holder
- OTW – (i) On The Way
- OTYBL – (i) Over To You Blue Leader
- OTYRL – (i) Over To You Red Leader
Read more about this topic: List Of Acronyms And Initialisms: O