| Abbreviation | Definition |
|---|---|
| ONDQA(CDER) | Office of New Drug Quality Assessment (CDER) |
| ONLDS(CFSAN) | Office of Nutrition, Labeling and Dietary Supplements (CFSAN) |
| ONP(CDER) | Office of Nonprescription Products (CDER) |
| ONPLDS(CFSAN) | Office of Nutritional Products, Labeling and Dietary Supplements (CFSAN) |
| OO(CFSAN) | Office of Operations (CFSAN) |
| OO(OC) | Offffice of the Ombudsman (OC) |
| OO(OC) | Office of Operations (OC) |
| OOB | Out Of Business |
| OODP(CDER) | Office of Oncology Drug Products (CDER) |
| OOP | Order Of Predominance (in the ingredients statement) |
| OOPD | Office of Orphan Product Development (FDA) |
| OOS | Out Of Specification |
| OP(OC) | Office of Policy (Office of the Commissioner) |
| OP1(OC) | Operations Team 1 (OC) |
| OP2(OC) | Operations Team 2 (OC) |
| OP3(OC) | Operations Team 3 (OC) |
| OP4 | Operations Team 4 |
| OP4(OC) | Operations Team 4 (OC) |
| OPA | Outcome, Purpose, Action |
| OPA(OC) | Office of Public Affairs (OC) |