Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The network was founded as the Educational Television and Radio Center (ETRC) in November 1952 by a grant from the Ford Foundation''s Fund for Adult Education. It was originally a limited service for exchanging and distributing educational programs produced by local television stations to other stations; it did not produce any material by itself. In the spring of 1954, ETRC moved to Ann Arbor, Michigan, and on May 16 of that year it began its operation as a "network". It put together a daily five-hour package of programming, releasing it primarily on kinescope film to the affiliated stations by mail. The programming was noted for treating subjects in depth, including hourlong interviews with people of literary and historical importance.