Professional Putters Association
The Professional Putters Association (PPA) was started in 1959 by Don Clayton, the founder of Putt-Putt Golf, in Fayetteville, North Carolina. Originally begun as the Professional Putt-Putt Golfers Association in 1959, the name was changed in 1960 to the Professional Putters Association.
Source: Wikipedia — Professional Putters Association (CC BY-SA 4.0)