O
| Abbreviation | Full Form |
|---|---|
| o/a | On account of |
| O/C | Open cover, open charter |
| O/D | On Demand (or) Overdrawn |
| O/o | Order of |
| O/R | Owner’s risk |
| OAU | Organisation of African Unity |
| OBO’s | Oil/Bulk/Ore carriers |
| OC | Opportunity Cost |
| OCF | Operating cash flow |
| OCN | Out-of-charge note |
| OCTs | The Overseas countries and territories of member states associated with the EEC under part 4 of the Treaty of Rome |
| OECD | Organisation for Economic Co-operation and Development |
| OEEC | Organisation for European Economic Co-operation |
| OEM | Original Equipment Manufacturer |
| OFT | Office of Fair Trading |
| OGL | Open General Licence |
| OIBDA | Operating Income Before Depreciation And Amortization |
| OJEC | Official Journal of the European Communities |
| OKR | Objectives and key results |
| on | Official number |
| OOF | Out of Facility |
| oog | Out of gauge |
| OP | Open or floating cargo insurance policy |
| OPB | Operative Performance Bond |
| OPEC | Organization of Petroleum Exporting Countries |
| OPEX | Operating Expenditure or Operational Expenditure |
| OPR | Outward Processing Relief |
| ORD | Order |
| OSI | Open Systems Interconnection (Computer Standards) |
| OTAR | Overseas Tariffs And Regulations |
| OTC | Over-the-counter |
| OTIF | On Time In Full |
| O&M | Operations and Maintenance |
| OAS | Organization of American States |
| OBC | Other Backward Class |
| OBL | Order of Bill of Lading |
| OBU | Offshore Banking Unit |
| OCB | Organizational Citizenship Behavior |
| OCC | Office of the Comptroller of the Currency |
| OECD | Organization for Economic Cooperation and Development |
| OEM | Original Equipment Manufacturer |
| OEE | Overall Equipment Effectiveness |
| OHSAS | Occupational Health and Safety Assessment Series |
| OIC | Organization of the Islamic Conference |
| OIG | Office of the Inspector General |
| OLTAS | Online Tax Accounting System |
| OMB | Office of Management and Budget |
| OMO | Open Market Operations |
| OPEC | Organization of the Petroleum Exporting Countries |
| ORB | Operational Risk Management in Banking Sector |
| OS | Outstanding Shares |
| OT | Overtime |
| OTC | Over-the-Counter |
| OTP | One-Time Password |
| OTR | On the Run (Securities) |
| OTS | Outstanding Time Deposit |
| OTT | Over the Top |
| OVC | Overseas Volunteer for a Better Canada |