Public Service Enterprise Group Inc. is a diversified energy company. Its operations are mostly located in the Northeastern and Mid-Atlantic parts of the United States. The company principally operates through two key subsidiaries - PSEG Power LLC and Public Service Electric and Gas Company. PSEG Power is a major electricity supplier in the Northeastern and Mid-Atlantic regions. The subsidiary integrates its generating operations and gas supply obligations, including wholesale energy, fuel supply and energy trading functions, through its wholly owned subsidiaries. PSE&G is a regulated public utility company primarily engaged in the transmission and distribution of electricity and natural gas in New Jersey. The unit also offers appliance services and repairs to customers across its service area. Public Service Enterprise has other subsidiaries - PSEG Energy Holdings L.L.C., PSEG Long Island LLC and PSEG Services Corporation, which are together known as PSEG Enterprise/Other.