English abbreviations from ootv to opal
- OOTV(Only On TeleVision)
- OOTW(Operations Other Than War)
- OOV(Officer of the Order of Volta)
- OOW(Oracle OpenWorld)
- OOZ(Typo for 00Z; MOS for Command Sergeant Major)
- OP(Observation post)
- OP.(Optimus (Excellent, or Supremely Good))
- O.P., Ord. Fratr. Praed.(Ordo Praedicatorum (Dominicans))
- OPA(Other Procurement, Army)
- OPAC(Online Public Access Catalogue)
- OPADD(Ontario Partnership on Aging & Developmental Disabilities)
- OPAG((organization) Outer Planets Assessment Group, a group established by NASA that provides advice on solar system exploration)
- OPAL(Online Performance And Learning)
