English abbreviations from ocfs to ocma
- OCFS (Oracle Cluster File System)
- OCFS [1] (Office of Children & Family Services)
- OCFS2 (Oracle Cluster File System Release 2)
- OCG (Outdoor Classroom Garden)
- O.C.G.A. (Official Code of Georgia Annotated)
- OCH (A. L. Mangham Jr. Regional Airport)
- OCHA (Office For The Coordination of Humanitarian Affairs)
- OCHR (Office of Civilian Human Resources)
- OCHSG (Oakdale Christian Homeschool Support Group)
- oci (Occitan language (ISO 639-2 code))
- OCID (Online Chemical Inventory Database)
- OCIDS (Optical Combat Identification System)
- OCIE (Organizational Clothing and Individual Equipment)
- OCIMF (Oil Companies International Marine Forum)
- OCIR (Operational Capability Improvement Request)
- O. Cist. (Ordo Cisterciensium (Cistercians))
- OCJ (Boscobel Aerodrome)
- OCJCS (Office of The Chairman of The Joint Chiefs of Staff)
- OCJCS-PA (Office of The Chairman of The Joint Chiefs of Staff-Public Affairs)
- OCL (Quality Control Log)
- OCLC (Online Computer Library Center)
- OCLL (Office of the Chief of Legislative Liaison)
- OCLV (Optimum Compaction Low Void)
- OCM (Outline Of Cultural Materials)
- OCMA (Ohio Coin Machine Association)
