| #7501 | Underwater Journal and Information Bulletin. -- Velká Británie : Guildford : IPC Science and Technology Press, 1971-1973 |
| #7502 | Underwater Science and Technology Journal. -- Velká Británie : Guildford : Iliffe Science and Technology, 1969-1970 |
| #7503 | Unesco bulletin for libraries. -- Francie : Paris : Uesco, 1947-1978. -- ISSN 0041-5243 |
| #7504 | Unesco journal of information science, librarianship and archives administration. -- Francie : Paris : Unesco, 1979-. -- ISSN 0379-122X |
| #7505 | Unfallschutz im Chemiebetrieb. -- Německo : Heidelberg : A. Hüthig, 1964- |
| #7506 | Unipetrol magazín. -- Praha : Unipetrol, 1998-2006 |
| #7507 | Universität Leipzig. -- Berlin : E. Schmidt, 1991-2002. -- ISSN 0947-1049 |
| #7508 | UNIX & open systems service, Edice: Information technology solutions. -- Delran : Datapro Information Services Group, 1991-. -- ISSN 1083-1851 |
| #7509 | UNIX review : The magazine of advanced operating environments. -- San Francisco : Miller Freeman, 1983-1998. -- ISSN 0742-3136 |
| #7510 | UNIX review's performance computing. -- San Francisco : Miller Freeman, 1998-1999. -- ISSN 1098-7150 |