PT Perusahaan Listrik Negara (Persero) engages in the generation, transmission and distribution of electrical power to residential, commercial, and industrial customers. It operates through the following segments: Sumatera, Jawa Bali and Nusa Tenggara, Kalimantan, Sulawesi, and Maluku Papua. Its other activities include electricity consultation, construction, installation, assessment, testing, operations, and maintenance of electrical power equipment, planning and development of electric power facilities, and research and support activities related to electricity. The company was founded on January 1, 1961 and is headquartered in Jakarta, Indonesia.