Although OTRCAT.com does not have recordings of every series listed below, the following is
quick reference guide to old time radio show series, theme music title, and composer (when available).

• Official Detective
  1. Opening Signature: "Official Detective Opening" - Chester ["Chet"] Kingsbury
  2. Main Theme: "Official Detective Theme" - Chester ["Chet"] Kingsbury
• Olivio Santoro - "Scrapple Jingle, to the tune of "Ta-Ra-Ra Boom-Der-E"" - Henry J. Sayers (m)
• One Man's Family
  1. (4/29/1932 - 10/13/1940): "Destiny" (Valse Lente)(1912) [aka: "Destiny Waltz (What Do We Know of the Morrow?)"] - Sydney Baynes (m); D. Eardley-Wilmot (w)
  2. (10/20/1940 - 4/24/1959): "Patricia" (Waltz) (1943) - Paul Carson
• O'Neills, The - "Londonderry Air" [vocal title: Danny Boy]- Ireland Traditional Irish Air from Londonderry County
• Open Door, The - "Sim Sholom" [Grant Peace] - Traditional Jewish Melody
• Original Amateur Hour, The [Major Bowes, Ted Mack]
  1. Theme 1: "There's No Business Like Show Business" [from the 1946 musical "Annie Get Your Gun"]- Irving Berlin
     
  2. Theme 2: "Let's Get On With The Show" - Wade F. Denning Jr.
     
  3. Theme 3: "Stand By" - Wade F. Denning Jr.; Lloyd Marx; Harold Orlob
     
  4. Close Theme 4: " Perfect Day, A" (1910) - Carrie Jacobs Bond
     
• Orphans of Divorce - "I'll Take You Home Again, Kathleen" - Thomas P. Westendorf
  
• Orrin Tucker [big band shows] - Signature Theme on various shows: "Drifting And Dreaming (Sweet Paradise)" - Egbert Van Alstyne (m); Erwin R. Schmidt (m); Loyal B. Curtis (m); Haven Gillespie (w)
• Our Gal Sunday - "Red River Valley" - originally a Canadian Folk Song circa 1869 Trad.
• Our Miss Brooks - "Brooks Theme" [aka: "Our Miss Brooks Theme"] - Wilbur Hatch
• Ozzie Nelson '27, and his Orchestra - "Loyal Sons of Rutgers" - Philip Bliss; Ozzie Nelson
• Ozzie and Harriet, The Adventures of - Main & End "Mary (I'm In Love With You)" (1931) - J. Fred Coots; Ozzie Nelson