sort by Rank | Alpha
| Possible Meanings | Rank |
| Orthodox Christian Publication Center | ** |
| Ocean and Coastal Policy Center | ** |
| Onslow County Partnership for Children | ** |
| Oregon Contractor Plan Center | ** |
| One Child Policy Crowd | ** |
| One Cellphone per Child | ** |
| Ontario Crop Protection Committee | ** |
| Orange County Peace Coalition | ** |
| Orange County Presidents Council | ** |
| Oregon Community Protection Coalition | * |
| Order in Council Privy Council | * |
| Orica Camel Powder Coatings | * |
| Oman Chemical and Pharmaceutical Company | * |
| Orange County Police Chiefs | * |
| Otthon Centrum Projekt Consulting | * |
| Off Campus Programs Committee | * |
| Old Colony Planning Commission | * |
| Orange County Persian Community | * |
| Oromia Cooperative Promotion Commission | * |
| Office of Caribbean Program Coordination | * |