Basketball rules change frequently with the intent of speeding its action, increasing the scoring, and offsetting the advantages given to teams with extremely tall players. Slightly different regulations govern international basketball and the college, scholastic, professional, and women's games in the United States. In 1971 rules for women's basketball were redrawn, making it more like the men's game. Games are supervised by referees, umpires, official scorekeepers, and timers.