| US | United States [of America] |
| POTUS | President Of The United States |
| USM | United States Mail |
| USAF | United States Air Force |
| FGOTUS | First Gentleman of the United States |
| USP | United States Pharmacopeia |
| USA | United States of America Vereinigte Staaten von Amerika |
| USS | United States Ship |
| USA | United States Army US-Armee, http://www.army.mil |
| USMP | United States Microgravity Payload |
| USGS | United States Geological Survey |
| USGA | United States Golf Association |
| USFL | United States Football League |
| USDA | United States Department of Agriculture |
| USD | United States [of America] Dollar [s] |
| USCG | United States Coast Guard |
| USCA | United States Code, Annotated |
| USAC | United States Answer Center |
| USMC | United States Marine Corps |
| USNO | United States Naval Observatory Washington, DC, http://www.usno.navy.mil/ |
| USAC | United States Auto Club |
| AUS | Army of the United States [engl.] |
| USIA | United States Information Agency |
| AFUS | Air Force of the United States [engl.] Amerikanische Luftwaffe |
| USEPA | United States Environmental Protection Agency |
| U.S. Dep. Agric. Bull. | United States Department of Agriculture Bulletin Zeitschrift |
| Contrib. U. S. Natl. Herb. | Contributions from the United States National Herbarium Zeitschrift |
| ECOM | United States Army Electronics Command |
| U.S. Dep. Agric. Misc. Publ. | United States Department of Agriculture Miscellaneous Publication Zeitschrift |
| Proc. Natl. Acad. Sci. U.S.A. | Proceedings of the National Academy of Science of the United States of America Zeitschrift |
| USN | Kriegsmarine der Vereinigten Staaten von Amerika [United States Navy] http://www.navy.mil |
| CH | CourtHouse |
| DOS | Density Of States Physik/ Magnetismus |
| BDOS | Bulk Density Of States |
| FRS | Free Rotor States |
| CIS | Commonwealth of Independent States |
| PDS | Planar Density of States |
| CSA | Confederate States of America |
| NIS | Newly Independent States |
| CBSS | Council of Baltic Sea States [engl.] Rat der Ostseestaaten, Stockholm, http://www.cbss.st |
| CSA | Centrifugal Sudden [coupled states] Approximation |
| TACIS | Technical Assistance to the Commonwealth of Independent States Technische Hilfe zugunsten der Neuen Unabhängigen Staaten und der Mongolei |
| AX | Trans States Airlines [IATA-Airline-Code/ USA] |
| 9N | Trans States Airlines [IATA-Airline-Code/ USA] |
| UA | United Artists |
| UA | United Atom |
| GB | United Kingdom |
| UP | United Press vgl. UPI |
| UNO | United Nations Organisation Organisation der Vereinten Nationen, NYC, http://www.un.org |
| UPI | United Press International Washinton, DC, http://www.upi.com |