| LDS | The Church of Jesus Christ of Latter-Day Saints Frankfurt/ M., http://www.kirche-jesu-christi.de |
| B. C. | before Christ [engl.] vor Christus, vor dem Jahr Null |
| HE-EUZ 227 | Helmut Christ Naturdärme Niedernhausen, Hessen |
| av. J.-C. | avant Jésus-Christ [frz.] Vor dem Jahre Null |
| COF | Church of Fear Schlingensief Kunstprojekt |
| ChurchH | Church History Zeitschrift |
| ce | Church of England |
| EZG 56 | Oberland - Truthahn Heinrich Christ Geretsried, Bayern |
| TLC | Trinity Lutheran Church Lynnwood, [WA], http://www.trinitylutheranchurch.com |
| RLDS | The Re-organized Church of Latter-Day Saints |
| UP | United Press vgl. UPI |
| UA | United Artists |
| UA | United Atom |
| GB | United Kingdom |
| UNO | United Nations Organisation Organisation der Vereinten Nationen, NYC, http://www.un.org |
| UAE | United Arab Emirates |
| UBS | United Bank of Switzerland |
| UHN | United Hackers Network Hackergruppe |
| USA | United States of America Vereinigte Staaten von Amerika |
| UPI | United Press International Washinton, DC, http://www.upi.com |
| UIP | United International Pictures |
| US | United States [of America] |
| USA | United States Army US-Armee, http://www.army.mil |
| USAF | United States Air Force |
| UPS | United Parcel Service |
| USO | United Service Organizations |
| USP | United States Pharmacopeia |
| FGOTUS | First Gentleman of the United States |
| USS | United States Ship |
| UTA | United Talent Agency |
| POTUS | President Of The United States |
| UCI | United Cinemas International |
| USM | United States Mail |
| UNEP | United Nations Environment Programm |
| UNSC | United Nations Security Council UN-Sicherheitsrat, NY, http://www.un.org/docs/sc |
| USFL | United States Football League |
| USCA | United States Code, Annotated |
| UN-Nummer | United Nations Gefahrgut-Kennzeichnungsnummer |
| USGA | United States Golf Association |
| USAC | United States Answer Center |
| USAC | United States Auto Club |
| USGS | United States Geological Survey |
| USIA | United States Information Agency |
| USDA | United States Department of Agriculture |
| USMC | United States Marine Corps |
| USMP | United States Microgravity Payload |
| USD | United States [of America] Dollar [s] |
| USCG | United States Coast Guard |
| USNO | United States Naval Observatory Washington, DC, http://www.usno.navy.mil/ |
| UNFPA | United Nations Population Fund Bevölkerungsfonds der Vereinten Nationen |