| FEDERAL AGENCY CODE | FEDERAL AGENCY |
| ACHP | ADVISORY COUNCIL ON HISTORIC PRESERVATION |
| AF | AIR FORCE |
| ARMY | DEPARTMENT OF THE ARMY |
| BIA | BUREAU OF INDIAN AFFAIRS |
| BLM | BUREAU OF LAND MANAGEMENT |
| BOR | BUREAU OF OUTDOOR RECREATION |
| BUREC | BUREAU OF RECLAMATION |
| CEQ | COUNCIL ON ENVIRNOMENTAL QUALITY |
| CG | COAST GUARD |
| COE | ARMY CORPS OF ENGINEERS |
| COMMERCE | DEPARTMENT OF COMMERCE |
| CPD | COMMUNITY PLANNING & DEVELOPMENT DEPARTMENT |
| DOD | DEPARTMENT OF DEFENSE |
| DOE | DEPARTMENT OF ENERGY |
| DOL | DEPARTMENT OF LABOR |
| DOT | DEPARTMENT OF TRANSPORTATION |
| ED | DEPARTMENT OF EDUCATION |
| EDA | ECONOMIC DEVELOPMENT ADMINISTRATION |
| EPA | ENVIRONMENTAL PROTECTION AGENCY |
| ETA | EMPLOYMENT AND TRAINING ADMINISTRATION |
| FAA | FEDERAL AVIATION ADMINISTRATION |
| FCC | FEDERAL COMMUNICATIONS COMMISSION |
| FDIC | FEDERAL DEPOSIT INSURANCE COMMISSION |
| FEA | FEDERAL ENERGY ADMINISTRATION |
| FEMA | Federal Emergency Mgmnt Adm. |
| FERC | FEDERAL ENERGY REGULATORY COMMISSION |
| FHA | FEDERAL HIGHWAY ADMINISTRATION |
| FMC | FEDERAL MARITIME COMMISSION |
| FmHA | FARMERS HOME ADMINISTRATION |
| FPC | FEDERAL POWER COMMISSION |
| FRA | FEDERAL RAILROAD ADMINISTRATION |
| FS | FOREST SERVICE |
| FWS | FISH AND WILDLIFE SERVICE |
| GS | GEOLOGICAL SURVEY |
| GSA | GENERAL SERVICES ADMINISTRATION |
| HHS | HEALTH AND HUMAN SERVICES DEPARTMENT |
| HUD | HOUSING AND URBAN DEVELOPMENT DEPARTMENT |
| IBWC | INTERNATIONAL BOUNDARY AND WATER COMMISSION |
| ICC | INTERSTATE COMMERCE COMMISSION |
| JUSTICE | DEPARTMENT OF JUSTICE |
| LEAA | LAW ENFORCEMENT ASSISTANCE ADMINISTRATION |
| MC | MARINE CORPS |
| MINES | BUREAU OF MINES |
| NASA | NATIONAL AERONAUTICS & SPACE ADMINISTRATION |
| NAVY | DEPARTMENT OF THE NAVY |
| NCPC | NATIONAL CAPITOL PLANNING COMMISSION |
| NPS | NATIONAL PARK SERVICE |
| NRC | NUCLEAR REGULATORY COMMISSION |
| NSF | NATIONAL SCIENCE FOUNDATION |
| OSM | OFFICE OF SURFACE MINING |
| PHS | PUBLIC HEALTH SERVICE |
| RDS | RURAL DEVELOPMENT SERVICE |
| REA | RURAL ELECTRIC ADMINISTRATION |
| SBA | SMALL BUSINESS ADMINISTRATION |
| SCS | SOIL CONSERVATION SERVICE |
| SHPO | STATE HISTORIC PRESERVATION OFFICE |
| SI | SMITHSONIAN INSTITUTION |
| STATE | STATE DEPARTMENT |
| TREASURY | DEPARTMENT OF THE TREASURY |
| TVA | TENNESSEE VALLEY AUTHORITY |
| UDAG | URBAN DEVELOPMENT ACTION GRANT |
| UMTA | URBAN MASS TRANSPORTATION ADMINISTRATION |
| UN | UNITED NATIONS |
| USDA | U.S. DEPARTMENT OF AGRICULTURE |
| USDI | U.S. DEPARTMENT OF THE INTERIOR |
| USPS | U.S. POSTAL SERVICE |
| VA | VETERANS ADMINISTRATION |
| WMATA | WASHINGTON METRO AND TRANSIT AUTHORITY |
| WPRS | WATER AND POWER RESOURCES SERVICE |