English abbreviations from otrr to ou
- OTRR (Operational Test Readiness Review)
- OTRS (Open-source Ticket Request System)
- OTS (Officer Training School)
- OTSBH (Over The Shoulder Boulder Holder)
- OTSG (One-time Through Steam Generator)
- OTSS (Online Tutorial Signup System)
- OTT (One True Thing)
- OTU (One Time Unit)
- OTV (Oddcast Television)
- OTW (On The Way)
- OTX (Open Theater X)
- OTY (Observe The Youth)
- OTYBL (Over To You Blue Leader)
- OTYRL (Over To You Red Leader)
- OTZ (Ralph Wien Memorial Airport)
- OU (University of Oklahoma)