| Abbreviation | Definition |
| ACHP | |
| AHLP | |
| AIA | |
| APE | |
| APT | |
| ARPA | |
| ASLA | |
| BECA | |
| CDBG | |
| CFR | |
| CLG | |
| CLR | |
| CRM | |
| DOE | |
| DOT | |
| EA | |
| EIS | |
| FPO | |
| GSA | |
| HABS | |
| HAER | |
| | Abbreviation | Definition |
| HBCUS | |
| HCRS | |
| HPF | |
| HUD | |
| ICOMOS | |
| IRS | |
| ISTEA | |
| ITC | |
| MOA | |
| NAAAHP | |
| NADB | |
| NAGPRA | |
| NAOP | |
| NAPC | |
| National Register (NRHP) | |
| NCPE | |
| NCPTT | |
| NCSHPO | |
| NCSL | |
| NEPA | |
| NHA | |
| | Abbreviation | Definition |
| NHL | |
| NHPA | |
| NPS | |
| NRIS | |
| NTHP | |
| PA | |
| SAA | |
| SAH | |
| SAT | |
| SHPO | |
| TCF | |
| TEA-21 | |
| THPO | |
| TNC | |
| TPL | |
| TPO | |
| UN | |
| UNESCO | |
| USAID | |
| WHSR | |
| WMF | |
|