Which measurement of light is abbreviated "lm"?

Which organization, abbreviated CIS, replaced the USSR in 1991? Which former Soviet republic, abbreviated EST, became independent in 1991? Abbreviated GB in computer terms, what equals 1,024 megabytes? Which trade agreement, abbreviated GATT, governed world commerce from 1947? 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 nation, abbreviated PRC, was founded by Mao Zedong in 1949?