| #41 | Cable World. -- Rockville : Access Intelligence, 1989-. -- ISSN 1931-7697 |
| #42 | Cablecaster. -- Toronto : Northern Miner, 1989-2006. -- ISSN 0840-9153 |
| #43 | Cablefax daily. -- Denver : Media Business, 1990-. -- ISSN 1069-6644 |
| #44 | Cableoptics newsletter. -- Boston : Information Gatekeepers, 1990-. -- ISSN 1051-1938 |
| #45 | Cabling installation & maintenance. -- Tulsa : PennWell, 1993-. -- ISSN 1073-3108 |
| #46 | Call center CRM solutions. -- Norwalk : Technology Marketing, 2000. -- ISSN 1529-1782 |
| #47 | Call center solutions. -- Norwalk : Technology Marketing, 1992-1999. -- ISSN 1521-0774 |
| #48 | Cellular business. -- Overland Park : Intertec, 1984-1997. -- ISSN 0741-6520 |
| #49 | Central America telecommunications report. -- London : Business Monitor International, 2008-. -- ISSN 1758-4914 |
| #50 | Circuits, systems, and signal processing. -- Cambridge : Birkhäuser Boston, 1982-. -- ISSN 0278-081X print. -- ISSN 1531-5878 online |