Jazz at the Philharmonic, or JATP (1944–1983), was the title of a series of jazz concerts, tours and recordings produced by Norman Granz.
JATP concert announcement 1956
Norman Granz was an American jazz record producer and concert promoter. He founded the record labels Clef, Norgran, Down Home, Verve, and Pablo. Granz was acknowledged as "the most successful impresario in the history of jazz". He was also a champion of racial equality, insisting, for example, on integrating audiences at concerts he promoted.
Granz in 1947