| #1271 | Trudy. -- Tbilisi : Sakartvelos SSR mecnierebata akademia, 1960-1983. -- ISSN 0135-0730 |
| #1272 | TSI. -- Paris : Hermès-Lavoisier, 1982-. -- ISSN 0752-4072 |
| #1273 | TÜV-Süd-Journal. -- München : TÜV Süd, 2006-. -- ISSN 1863-8198 |
| #1274 | Typografia. -- Praha : Digirama, 1888-. -- ISSN 0322-9068 |
| #1275 | T3-Hračky pro muže. -- Praha : Omega Publishing Group, 1999-2010. -- ISSN 1212-6047 |
| #1276 | Unesco bulletin for libraries. -- Francie : Paris : Uesco, 1947-1978. -- ISSN 0041-5243 |
| #1277 | Unesco journal of information science, librarianship and archives administration. -- Francie : Paris : Unesco, 1979-. -- ISSN 0379-122X |
| #1278 | Universal access in the information society. -- Berlin : Springer, 2001-. -- ISSN 1615-5289 print. -- ISSN 1615-5297 online |
| #1279 | UNIX & open systems service, Edice: Information technology solutions. -- Delran : Datapro Information Services Group, 1991-. -- ISSN 1083-1851 |
| #1280 | UNIX review : The magazine of advanced operating environments. -- San Francisco : Miller Freeman, 1983-1998. -- ISSN 0742-3136 |