| BEG | Border Enforcement Grant | unable to verify |
| CTR | Center for Transportation Research | unable to verify |
| DPT-CHEN | Divison of Pharm/Tox for Cardiology, Hematology, Endocrinology, and Nephrology | changed to DPT-OCHEN - Division of Pharmacology/Toxicology or Cardiology, Hematology, Endocrinology and Nephrology |
| FRCC | Fire Regime Condition Class | unable to verify |
| IWM | Office Integrated of Waste Management | unable to verify |
| MMS | MEDLARS Management Section | website archived 2/24 |
| MT&D | Marine Trash & Debris Program | changed again to Marine Debris Program |
| PSD | Public Services Division | website archived 4/24 |
| SaDIP | Safety Data Improvement Program | unable to verify |
| SFWD | Office of Spent Fuel and Waste Disposition | changed to Office of Spent Fuel and High-Level Waste Disposition - no acronym |
| SFWST | Office of Spent Fuel & Waste Science and Technology | unable to verify |
