The Source was a radio network operated in the 1970s and 1980s by the NBC Radio Network, with newscasts and features focusing on 18- to 34-year-olds. The network was sold, along with the rest of NBC's radio operations, to Westwood One in August 1987. The Source would last until the late 1990s as a programming source before ultimately being absorbed into Westwood One.
Announcements from the network, voiced by legendary NBC announcer Don Pardo, are still heard on many radio stations across the country.