Creator : Bob Bruninga (WB4APR) in 1992

From "What is APRS" in "APRS protocol reference version 1.0", it is explained that:
"APRS is short for Automatic Position Reporting System, which was designed by Bob Bruninga, WB4APR, and introduced by him at the 1992 TAPR/ARRL Digital Communications Conference.
Fundamentally, APRS is a Packet communication protocol for disseminating live data to everyone on a network in real time. Its most visual feature is the combination of Packet radio with the Global Positionning System (GPS) satellite network, enabling radio amateurs to automatically display the positions of radio stations and other objects on maps on a PC.

Other features not directly related to position reporting are supported, such as weather station reporting, direction finding and messaging."

APRS is described in the "APRS protocol reference version 1.0" written by G3NRW (Ian) and the "APRS Working Group". This protocol is available on the TAPR Web site.
Modifications (version 1.1) and corrections have been introduced.

PACKET 300 bauds + APRS (USB)
3590-3600 (QSO), 10150 LSB (APRS), 14090-14099 (QSO), 14101-14112 (BBS), 14105 (APRS), 18102 (APRS), 21100-21120 (QSO), 21113 (APRS), 28120-28150 KHz (QSO)