sort by Rank | Alpha
| Possible Meanings | Rank |
|---|
| Orinda Moraga Pool Association | ** |
| Ontario Modern Pentathlon Association | * |
| Online Motion Picture Academy | * |
| Oklahoma Muni Power Auth | * |
| Open Multimedia Protocol Alliance | * |
| Oregon Media Producers Association | * |
| Offtrail Magazine Publishers Association | * |
| Oregon Media Production Assn | * |