| OBC |
Oriental Bank of Commerce |
| OBC |
Other Backward Classes |
| OBC |
Other Backward Castes |
| OBCS |
Onboard Checkout Subsystem |
| OBDH |
On Board Data Handling |
| OBE |
Outboard Booster Engine |
| OBE |
Order of the British Empire |
| OBL |
Operational BaseLine |
| OBS |
Operational Biomedical System |
| OBS |
Operational Biomed Sensors |
| OBS |
Operational Bioinstrumentation System |
| OBS |
Observing and Information Systems |
| OBSS |
Orbiter Boom Sensor System |
| OBT |
Order of the Burdened Tyger |
| OC |
Open Cast |
| OCA |
Olympic Council of Asia |
| OCA |
Online Crash Analysis |
| OCA |
Oregon Cattlemen's Association |
| OCALC |
Oklahoma City Air Logistics Center |
| OCB |
Overseas Corporate Bodies |
| OCC |
Obscure Canon Character |
| OCC |
Operations Control Center |
| OCC |
Office of Contract Compliance |
| OCD |
Operational Capability Development |
| OCDR |
Orbiter Critical Design Review |
| OCDS |
Obsessive Compulsive Drinking Scale |
| OCDU |
Optics Coupling Data Unit |
| OCE |
Optical Control Electronics |
| OCE |
Ocean Color Experiment |
| OCF |
Orange County Foundation for Oncology |
| OCF |
Orbiter Computational Facilities |
| OCF |
Onboard Computational Facility |
| OCGF |
Organic Crystal Growth Laboratory Facility |
| OCGF |
Organic Crystal Growth Facility |
| OCH |
Orbiter Common Hardware |
| OCI |
Overseas Citizens of India |
| OCIA |
Organic Crop Improvement Association |
| OCIS |
Output Costing Information System |
| OCL |
Operations Control Language |
| OCM |
Organic Content Monitor |
| OCM |
Order Of Civil Merit |
| OCN |
Order Control Number |
| OCNA |
Ovarian Cancer National Alliance |
| OCP |
Output Control Pulse |
| OCR |
Optical Character Recognition |
| OCRF |
Ovarian Cancer Research Fund |
| OCRM |
Orbiter Crash and Rescue Manuals |
| OCS |
Overseas Communication Service |
| OCS |
Optical Control System |
| OCS |
Onboard Checkout System |