WJZ radio, originally owned by Westinghouse and its informal network were absorbed into the National Broadcasting Company in 1927. To the parent company Radio Corporation of America, WJZ and affiliates were known as the Blue Network while New York station WEAF and its affiliates (also absorbed into NBC) were known as the "Red Network". On the air, both were identified as "NBC, the National Broadcasting Company." The distinctions between the two networks were, beyond staff and advertisers, mostly a matter of the more popular and established programming appearing on NBC Red.

Both NBC networks were owned by RCA; following a Federal Communications Commission investigation into the network's influence over advertising, strict ownership rules were introduced in 1941. RCA was compelled to sell one network and three local stations.

RCA put an asking price of $8 million on the Blue network; after two years on the market, it was sold in 1943 to businessman Edward J. Noble, owner of Life Savers candy and the Rexall store chain, for the asking price. After Noble took over, the network identified itself on-air as "The Blue Network". It was officially renamed American Broadcasting Companies, Inc., in June 1945, after the company bought the rights to the name from (what would later become) Storer Broadcasting.

With about 65 affiliates, ABC began with few of the big names and popular shows the other networks offered, so counter-programming became an ABC specialty. Industry policy had been to forbid taped or pre-recorded programs; ABC lured some big-name stars by adapting the tape technology developed in World War II. To add to its programming, ABC bought stations KECA (now KABC) in Los Angeles and WXYZ (now WXYT) in Detroit, the latter home and originator of many popular serials such as The Lone Ranger. ~ Wikipedia