Viacom International Inc. is a current subsidiary of Viacom (as was the case with Viacom's predecessor; that former Viacom International is now known as CBS Operations Inc.).
It is the holding company for copyrights associated with Viacom's corporate websites and its cable networks, specifically MTV Networks, and is the division which licenses the product rights for their various properties. Before the merger with CBS Corporation in 1999, it also acted as the licensee company for Viacom's owned television stations; for instance New Britain, Connecticut station WVIT, currently an NBC owned and operated station for the Hartford market owned by Viacom from 1978 until 1997, took their call letters from Viacom International.
Viacom International also continues to focus on its own in-house productions made for its various networks such as MTV, VH1, Nickelodeon. Viacom International is a partner in Comedy Partners, the Viacom subsidiary which owns Comedy Central. (The other partner is Viacom Hearty Ha! Ha!, former owner of the Ha! network.)