The PGA is the Professional Golfers' Association, a US organisation for people who make money from golf: players, people who run golf courses, and teachers who give lessons. It also puts on a famous tournament, the PGA Championship, one of the four biggest men's events in the game (with the Masters, the US Open, and the Open). When fans say 'the PGA Tour', they mean the main US series of pro tournaments. Though actually, the picture is a little messy: the old association and the big tournament tour later became separate bodies, and news still says 'the PGA' for both. Golf fans in Taiwan usually keep the English letters. It is a name, not a word you change for tense or plural. There is a women's tour with its own letters (LPGA); PGA on its own, in most headlines, still points at the men's US world.