National Educational Radio Network

The National Educational Radio Network (NERN) was a means of distributing radio programs in the United States between 1961 and 1970. With funding from the Ford Foundation (who also funded the National Educational Television and Radio Center (who later spun off its radio assets)), the network began broadcasting on six radio stations on April 3, 1961.

Source: Wikipedia — National Educational Radio Network (CC BY-SA 4.0)