Samsung Semiconductor, Samsung Electronics Samsung SDS, and other Samsung interrelated enterprises. LGCNS, LG Electronics, LG TV, GS Caltex, LG Philips, LG Philips LCD, LG EIN, LG Electronics EVN, Living Support Center LG Power, LG Chemical, SKC&C, and over 150 enterprises.
KT, LG Telecom, KTF, and other telecommunication enterprises.
Agency for Defense Development, Seoul Metropolitan Police Agency, and over 100 government and public offices Kookmin Bank, Shinhan Bank, Samsung FN, BC Card, LG Card, AllianzeLife, Prudential Financial, National Information and Credit Evaluation. Inc., ING Life, Samsung Life, and other over 100 financial companies, Etc.