Douglas Harper's Etymology Dictionary
abbreviation of "public address" (system), attested from 1936.
init. 1 public address system 2 per annum
P.A. (short for Parental Advisory) was a Southern hip hop trio, part of the Atlanta-based Dungeon Family. Its members include Mello, K.P. and Big Reese. In 1993, they released their debut album, Ghetto Street Funk. In 1998, they released their second studio album, titled Straight No Chase on DreamWorks Records. The single "Like We Do" became a southern anthem while the group’s second single, "Reservations" secured a spot on the Blade (soundtrack) earning the group a Gold Record for the soundtrack. My Life, Your Entertainment was the group’s second record distributed by DreamWorks Records as well. The single "Sundown" featuring 8Ball filled the southeastern airwaves while BET played the video in heavy rotation.