| #501 | Graphical models and image processing. -- Orlando : Academic Press, 1995-1999. -- ISSN 1077-3169 |
| #502 | Graphs and combinatorics. -- Tokyo : Springer, 1985-. -- ISSN 0911-0119 print. -- ISSN 1435-5914 online |
| #503 | The grey journal. -- Amsterdam : TextRelease, 2005-. -- ISSN 1574-1796 print. -- ISSN 1574-180X online |
| #504 | Hacking. -- Praha : Software Media, 2003. -- ISSN 1214-2530 |
| #505 | Hakin9 : magazín pro všechny, kteří se zajímají o bezpečnost informačních systémů. -- Warszawa : Software-Wydawnictwo, 2004-. -- ISSN 1214-7710 |
| #506 | Hardware age home improvement market. -- Radnor : Chilton, 1995-1998. -- ISSN 1088-6168 |
| #507 | Hardware & home centre magazine. -- Don Mills : Wadham Publications, 1988-. -- ISSN 0847-9968 |
| #508 | Hardware merchandising (1993?). -- Toronto : Maclean Hunter, 1993-. -- ISSN 1199-2786 |
| #509 | The Hearing journal : the journal of hearing care and technology. -- Baltimore : Williams & Wilkins, 1983-. -- ISSN 0745-7472 |
| #510 | Hewlett-Packard journal. -- Palo Alto : Hewlett-Packard, 1950-1998. -- ISSN 0018-1153 |