Moses Annenberg acquired the Daily Racing Form in 1922; it was the start of his racing wire service providing results to bookies and gamblers, which bankrolled his other publishing ventures.

Clarke Fisher Ansley joined Columbia University Press on 1 January 1928 to commence work on the Columbia Encyclopedia, which was published in 1935.

Harold W. Arlin of KDKA Pittsburgh became the first full-time radio announcer in 1922.

Edwin Howard Armstrong sold his regeneration and superheterodyne radio patents to Westinghouse for $335,000 in 1920. He later develops FM.

William Bird's Paris-based Three Mountains Press published its first book — Ezra Pound's Indiscretions — in 1923.

Dr. S. Parkes Cadman, prominent minister and syndicated columnist, began a weekly religious program for NBC in 1928.

The Cohn brothers—Jack and Harry—founded Columbia Pictures in 1924.

Poet-publisher Harry Crosby murdered his mistress and commited suicide on 10 December 1929.

Harry and Caresse Crosby's Paris-based Black...