| Acronym | Meaning |
| OECA | Office Of Enforcement And Compliance Assurance |
| ORACBA | Office Of Risk Assessment And Cost-Benefit Analysis |
| STB | Surface Transportation Board |
| INS | Immigration And Naturalization Service (replaced By USCIS) |
| NRPC | National Railroad Passenger Corporation (AMTRAK) |
| OFHEO | Office Of Federal Housing Enterprise Oversight |
| ICC | Interstate Commerce Commission |
| DAU | Defense Acquisition University |
| DOS | Department Of State |
| WISQARS | Web-based Injury Statistics Query And Reporting System |