| #401 | NET. Zeitschrift für angewandte Telekommunikation. -- Heidelberg : Decker Hüthig, 1989-1993. -- ISSN 0947-4757 |
| #402 | New electronics. -- London : Northwood Publications, 1968-. -- ISSN 0047-9624 |
| #403 | Newsletter, IEEE Antennas and Propagation Society. -- New York : Institute of Electrical and Electronics Engineers, 1973-1989. -- ISSN 2168-0329 print. -- ISSN 2168-0337 online |
| #404 | Nuts & volts. -- Corona : T & L Publications, 1999-. -- ISSN 1528-9885 |
| #405 | Obraz a zvuk : nezávislý měsíčník o audiovizuální technice. -- Praha : AVM, 2013-. -- ISSN 1805-725X |
| #406 | On Top. -- Eindhoven : Assembléon Netherlands |
| #407 | One to one : The international media manufacturing. -- London : CMP Information, 1985-. -- ISSN 0268-8786 |
| #408 | Optical and quantum electronics. -- London : Chapmann and Hall, 1975-. -- ISSN 0306-8919 print. -- ISSN 1572-817X online |
| #409 | Optical materials. -- Amsterdam : Elsevier Science, 1992-. -- ISSN 0925-3467 print. -- ISSN 1873-1252 online |
| #410 | Optics and laser technology. -- Amsterdam : Elsevier, 1970-. -- ISSN 0030-3992 |