| USAAF Abbreviations Glossary of terms used in the United States Army Airforces. | |
| US Military and State Abbreviations and Acronyms Contains terms and aircraft designations for all military branches. | |
| United States Navy Patrol Squadrons Glossary of acronyms and terminology. | |
| Tech-Writer.net - Aerial Reconnaissance and Imagery Analysis Acronyms Mostly military terms. | |
| Space and Electronic Warfare Lexicon Acronyms and terms relating to space, computers, and related technologies. Most terms have source citations. | |
| Military Acronyms, Initialisms and Abbreviations Indexed online database of military shorthand terms. | |
| Military Acronyms An alphabetical database. | |
| DOD Dictionary US Defence Department master database. | |
| WWW Acronym and Abbreviation Server Allows a search for terms containing a particular word. | |
| Wiley InterScience Acronym Finder Scientific and technical terms, and symbols, with browsing and searching tools. | |
| Veterinary Abbreviations and Acronyms Glossary Terms commonly used in veterinary practice. | |
| V.E.R.A. - Virtual Entity of Relevant Acronyms List of computer acronyms, with cross references. | |
| USPS Official Abbreviations Official abbreviations of the United States Postal Service. | |
| USPS Acronyms and Abbreviations Glossary United States Postal Service terms and operational numbers. | |
| The Ultimate Computer Acronyms Archive (TUCAA) Offers a searchable or browsable interface. | |
| The Great Abbreviations Hunt A general guide to three letter terms. | |
| Svetlozar Online's Abbreviation Glossary Computer and telecommunications acronyms and their meanings. Searchable and browsable. | |
| Oceanic and Atmospheric Acronyms Specialized collection from the US National Oceanic and Atmospheric Administration. | |
| MediLexicon Searchable database of pharmaceutical, healthcare and medical abbreviations and acronyms. | |
| List of US Government Acronyms A glossary of terms found in US government databases and in print publications. | |
