1930    W1XAV in Boston, Massachusetts broadcasts video from the CBS radio orchestra program, ''The Fox Trappers''. The broadcast also includes the first television commercial in the United States, an advertisement for I.J. Fox Furriers, who sponsored the radio show.

1948    With a Musicians Union ban lifted, the first telecasts of classical music in the United States, under Eugene Ormandy and Arturo Toscanini, are given on CBS and NBC.

1951    The first long-running American television soap opera, ''Search for Tomorrow'', airs its first episode on the CBS network.

1954    McCarthyism: CBS television broadcasts the ''See It Now'' episode, "A Report on Senator Joseph McCarthy", produced by Fred Friendly.

1959    The anthology series The Twilight Zone premieres on CBS television.

1968    ''60 Minutes'' debuts on CBS.