Nickelodeon (usually abbreviated as "Nick", and originally named Pinwheel from December 1, 1977 to March 31, 1979), is an American cable television network owned by MTV Networks, a subsidiary of Viacom International. The channel is primarily aimed at children ages 6–14, with the exception of their weekday morning program block aimed at preschoolers ages 2–5. Since 2006, Nickelodeon has been run by MTVN Kids & Family Group president Cyma Zarghami.
As of 2010, Nickelodeon is ranked as the #1 cable channel among the kids 2-11 and 6-11 demographics, outranking competitors Disney Channel and Cartoon Network. For most of its history, the channel had been promoted as "The First Kids' Network," as Nickelodeon was the first American television network aimed at children, dating back to its days under the Pinwheel name.
Nickelodeon's broadcast day runs on Sunday through Thursdays from 7 a.m.-8 p.m., Fridays from 7 a.m.-9 p.m. and Saturdays from 7 a.m.-10 p.m. (Eastern and Pacific Time). It shares its channel space with Nick at Nite, a nighttime channel/programming block airing mainly sitcom reruns, created in 1985, that airs during the interim hours and is treated as a separate channel from Nickelodeon by A.C. Nielsen Co. for ratings purposes. The two services are sometimes referred to under the collective name "Nickelodeon/Nick at Nite", due to their association as two individual channels sharing the same channel space.