| Acronym | Meaning |
| CEOS | Child Exploitation And Obscenity Section |
| NPCR | National Program Of Cancer Registries |
| SIC | Standard Industrial Classification |
| AFS | Air Facility Sub-System |
| ICAO | International Civil Aviation Organization |
| NCCAM | National Center For Complementary And Alternative Medicine |
| DPC | Domestic Policy Council |
| DFAS | Defense Finance And Accounting Service |
| NCHSTP | National Center For HIV |
| ENC | Eisenhower National Clearinghouse |