English abbreviations from oca to occb
- OCA (Ocean Reef Club Airport (FAA: 07FA))
- OCAD (Ontario College of Art and Design)
- OCAD U (OCAD University (prior to 2010, OCAD was an acronym for Ontario Collage of Art & Design))
- O. Camald. (Ordo Camaldulensium (Camaldolese))
- OCAP (OpenCable Application Platform)
- OCAR (Office of the Chief of Army Reserve)
- O. Cart. (Ordo Cartusiensis (Carthusians))
- OCAS (Ontario College Application Service)
- OCASE (Ontario Computer Animation & Special Effects Tax Credit)
- OCASP (Orange County Active Single Parents)
- OCAST (Oklahoma Center for the Advancement of Science and Technology)
- OCB (Oklahoma Center for the Book)
- OCBC (Orange County Badminton Club)
- OCC (Operations Control Center)
- O.C.C. (Ordo Carmelitarum Calceatorum (Carmelites))
- Occ. (Occupation)
- OCCA (Ocean Cargo Clearance Authority)
- OCCB (Office of Community Capacity Building)