SK그룹
SK Telecom was established in March 1984 under the name "Korea Mobile Telecommunications Services Corp." ("KMTSC; "), but was renamed "Korea Mobile Telecommunications Corp." ("KMTC; ") in May 1988. It was a subsidiary of the state monopoly phone company, Korea Telecom (now known as KT Corp.) until KT sold it off in 1993. In June 1994 SK Group (Formerly Sunkyong Group) became Korea Mobile Telecommunications Corporation's largest shareholder. KMTC officially joined the SK Group in January 1997 and changed its name to "SK Telecom" in March of that year.