| Acronym | Meaning |
 | OPA | Office Of Population Affairs |
| NIAMS | National Institute Of Arthritis And Musculoskeletal And Skin Diseases |
| OSBP | Office Of Small Business Programs |
| NAL | National Agricultural Library |
| USN | United States Navy |
| FEDIX | Federal Information Exchange Inc. (ceased Operation 7/3/02) |
| OERI | Office Of Educational Research And Improvement (replaced By IES) |
| OVAE | Office Of Vocational And Adult Education |
| DPMO | Defense Prisoner Of War/Missing Personnel Office |
| MESH | Medical Subject Headings |
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