Unicode: http://www.unicode.org/
Unicode Consortium: http://www.unicode.org/consortium/consort.html
UNIMARC: http://www.ifla.org/VI/3/p1996-1/concise.htm
Union internationale des télécommunications (UIT): http://www.itu.int/home/index-fr.html
United Nations System of Organizations: http://www.unsystem.org/
Universal Conjugator (Logos): http://www.verba.org/
Universal Copyright Convention: http://www.unesco.org/culture/laws/copyright/html_eng/page1.shtml
Universal Library (The): http://ul.cs.cmu.edu/
Universal Networking Language (UNL): http://www.undl.org/
Université de Caen: http://www.unicaen.fr/