| Abbreviation | Definition |
|---|---|
| NZQT | New Zealand Question Time/Parliament |
| NZQT | New Zealand Question Time/Parliament |
| NZSG | Net Zero Scrutiny Group |
| OACBHA | Ohio Association of County Behavioral Health Authorities (political action committee; Columbus, OH) |
| OAG | Organized Armed Group |
| OAS | Organisation de l’Armée Secrète |
| OAS | Organisation de lArmée Secrète |
| OASIS | Organization for the Advancement of Structured Information Standards |
| OBVC | Operation Black Vote Canada |
| OC | Official Campaign |
| OCDP | Oakland County Democratic Party |
| OCDP | Orange County Democratic Party |
| OCPAC | Oklahoma Conservative Political Action Committee |
| ODCP | Observatoire du Changement Politique |
| ODF | Oromo Democratic Front |
| ODM | Orange Democratic Movement |
| ODPO | Organisation démocratique des peuples Oromo |
| OFA | Organizing for Action |
| OGRE | Old Guard Republican Establishment |
| OIA | Oregonians In Action |