C-Net, C-net, CNet, Cnet, or CNET may refer to:
CNET or c|net, an American media website about technology and consumer electronics C-Net DS2 or CNet DS2, bulletin board software for Commodore 64 computer system since 1986
C-Net or C=Net, an ancestor edition of the C-Net DS2 bulletin board software for the Commodore computer system C-Net 128, C-Net Amiga, and CNet Amiga Pro, other editions of the C-Net bulletin board software for the Commodore computer system Centre national d'études des télécommunications, a national telecommunications research institute in France from 1944 to 2000 c-net, a type of polyhedral graph