Which league, abbreviated NASL, peaked in the 1970s with stars like Franz Beckenbauer and Pelé?

Abbreviated GB in computer terms, what equals 1,024 megabytes? Which trade agreement, abbreviated GATT, governed world commerce from 1947? Which measurement of light is abbreviated "lm"? What is the French equivalent of "Miss", abbreviated "Mlle"? Which 1963 treaty, abbreviated NTBT, was signed by the U.S., the USSR and the U.K.? Which nation, abbreviated PRC, was founded by Mao Zedong in 1949? 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?