CHUM Limited Is a media company based in Toronto, Ontario, Canada, from 1945 to 2007. Immediately prior to its acquisition, it held full or joint control of two Canadian television systems — Citytv and A-Channel (formerly NewNet, now CTV Two) — comprising 11 local stations, and one CBC Television (Canadian Broadcasting Corporation) affiliate, one provincial educational channel, and 20 branded specialty television channels, most notably MuchMusic and its various spinoffs.