Nickelodeon, often simply called Nick and originally called The Pinwheel Network, is an American children's channel and teens channel owned by Viacom Inc. and operated under its Nickelodeon Kids and Family Group. The channel is primarily aimed at children in grade school and teens, with their weekday morning program block aimed at preschoolers ages 2–5. Since 2004, Nickelodeon has been run by Cyma Zarghami. It had ranked as the No. 1 cable channel as of early 2011 but by the end of that year had suffered a double-digit ratings drop described as "inexplicable" by parent company Viacom.
Nickelodeon's broadcast day runs on Sundays-Wednesdays from 6 a.m.-8 p.m., Thursdays and Fridays from 6 a.m.-9 p.m., and Saturdays from 6 a.m.-10 p.m. (Eastern and Pacific Time). Since 1985, it shares its channel space with Nick at Nite, a night time channel that airs sitcom reruns during the interim hours. It is treated as a separate channel from Nickelodeon by A.C. Nielsen Co. for ratings purposes.