1927 The Columbia Phonographic Broadcasting System (later known as CBS) is formed.
1943 Leonard Bernstein, substituting at the last minute for ailing principal conductor Bruno Walter, directs the New York Philharmonic in its regular Sunday afternoon broadcast concert over CBS Radio. The event receives front page coverage in the New York Times the following day.
1943 Edward R. Murrow delivers his classic "Orchestrated Hell" broadcast over CBS Radio describing a Royal Air Force nighttime bombing raid on Berlin.
1950 The Federal Communications Commission issues the first license to broadcast television in color, to CBS (RCA will successfully dispute and block the license from taking effect, however).
1951 I Love Lucy debuts on CBS.
1955 ''Gunsmoke'' debuts on CBS.
1959 CBS Radio cuts four soap operas: ''Backstage Wife'', ''Our Gal Sunday'', ''Road of Life'', and ''This is Nora Drake''.
1959 Rod Serling's classic anthology series ''The Twilight Zone'' premieres on CBS.
1962 CBS broadcasts the final episodes of ''Suspense'' and ''Yours Truly, Johnny Dollar'', marking the end of the Golden Age of Radio.
1967 Jim Morrison and The Doors defy CBS censors on ''The Ed Sullivan Show'', when Morrison sings the word "higher" from their #1 hit ''Light My Fire'', despite having been asked not to.
1967 ''Love is a Many Splendored Thing'' debuts on US daytime television and is the first soap opera to deal with an interracial relationship. CBS censors find it too controversial and ask for it to be stopped, causing show creator Irna Phillips to quit.
1969 Hee Haw makes its debut on CBS
1972 H]]'' debuts on CBS.
1972 ''The Price Is Right'' debuts on CBS.
1983 H]]'' ends after 11 years and 251 episodes on CBS.
2004 Rich Fields becomes the new permanent announcer on CBS's The Price Is Right