English abbreviations from ocmb to ocr
- OCMB (Oberlin College Marching Band)
- OCMC (Orthodox Christian Mission Center)
- OCMCC ([2] Orchard County MCC)
- OCMCI (Orthodox Christian Mission Center, Inc.)
- OCMH (Oneida Community Mansion House)
- OCN (Oncology Certified Nurse)
- OCNA (Ontario Community Newspapers Association)
- OCNB (Office of the Chief, National Guard Bureau)
- OCNM (Oklahoma City National Memorial)
- OCNMT (Oklahoma City National Memorial Trust)
- OCO (Oort Cloud Object)
- OCOKA (Observation and fields of fire, Cover and concealment, Obstacles, Key terrain, and Avenues of Approach.)
- OCONUS (Outside the Continental United States)
- O-CONUS (Outside Continental United States)
- OCOP (Outline Contingency Operation Plan)
- OCP (Official Community Plan)
- OCPA (Office of the Chief of Public Affairs)
- OCPP (Oshkosh Community Playground Project)
- OCR (Office of Collateral Responsibility)
- O.C.R. (Ordo Reformatorum Cisterciensium (Cistercians, Trappists))
