Which nation, abbreviated PRC, was founded by Mao Zedong in 1949?

Which measurement of light is abbreviated "lm"? What is the French equivalent of "Miss", abbreviated "Mlle"? Which league, abbreviated NASL, peaked in the 1970s with stars like Franz Beckenbauer and Pelé? Which 1963 treaty, abbreviated NTBT, was signed by the U.S., the USSR and the U.K.? Which Australian newspaper, abbreviated SMH, was first issued in 1831? Abbreviated SPR, what is the U.S. government's emergency store of oil created in the 1970s? Which entertainment union, abbreviated WGA, went on strike in 1981, 1985 and 1988? Abbreviated TSE, which is Canada's largest stock exchange?