| #5441 | Open computing : McGraw-Hill's magazine of open systems computing. -- San Mateo : McGraw-Hill, 1994-1995. -- ISSN 1078-2370 |
| #5442 | Open systems today : the newspaper of UNIX and interoperable computing. -- Manhasset : CMP Publications, 1992-1995. -- ISSN 1040-5038 |
| #5443 | Operating experience with nuclear power stations in member states in ... -- Vienna : nternational Atomic Energy Agency, 1979-2005. -- ISSN 1011-2642 |
| #5444 | Operational research quarterly. -- Oxford : Pergamon Press, 1970-1977. -- ISSN 0030-3623 |
| #5445 | Operations research. -- Baltimore : The Operations Research Society of America, 1956-. -- ISSN 0030-364X print. -- ISSN 1526-5463 online |
| #5446 | Optica acta. -- Basingstoke : Taylor & Francis, 1954-1986. -- ISSN 0030-3909 |
| #5447 | Optica Applicata. -- Wroclaw : Technical University, 1971-. -- ISSN 0078-5466 print. -- ISSN 1899-7015 online |
| #5448 | Optical and quantum electronics. -- London : Chapmann and Hall, 1975-. -- ISSN 0306-8919 print. -- ISSN 1572-817X online |
| #5449 | Optical engineering : the journal of SPIE - the International Society for Optical Engineering. -- Bellingham : Society of Photo-Optical Instrumentation Engineers, 1972-. -- ISSN 0091-3286 |
| #5450 | Optical materials. -- Amsterdam : Elsevier Science, 1992-. -- ISSN 0925-3467 print. -- ISSN 1873-1252 online |