| #5431 | Online : the magazine of online information systems. -- Wilton : Online, 1977-2012. -- ISSN 0146-5422 |
| #5432 | Online & CD ROM review : The International Journal of Online & Optical Information Systems. -- Oxford : Learned Information (Europe) Ltd., 1993-1999. -- ISSN 1353-2642 |
| #5433 | Online information review. -- Bradford : MCB University Press., 2000-. -- ISSN 1468-4527 |
| #5434 | Online searcher : information discovery, technology, strategies. -- Medford : Information Today, 2013-. -- ISSN 2324-9684 |
| #5435 | Open computing : McGraw-Hill's magazine of open systems computing. -- San Mateo : McGraw-Hill, 1994-1995. -- ISSN 1078-2370 |
| #5436 | Open systems today : the newspaper of UNIX and interoperable computing. -- Manhasset : CMP Publications, 1992-1995. -- ISSN 1040-5038 |
| #5437 | Operating experience with nuclear power stations in member states in ... -- Vienna : nternational Atomic Energy Agency, 1979-2005. -- ISSN 1011-2642 |
| #5438 | Operational research quarterly. -- Oxford : Pergamon Press, 1970-1977. -- ISSN 0030-3623 |
| #5439 | Operations research. -- Baltimore : The Operations Research Society of America, 1956-. -- ISSN 0030-364X print. -- ISSN 1526-5463 online |
| #5440 | Optica acta. -- Basingstoke : Taylor & Francis, 1954-1986. -- ISSN 0030-3909 |