O2 (UK) first commercial General Packet Radio Service. BT Cellnet, together with BT Group's mobile telecommunications businesses in Germany, Ireland and the Netherlands, was part of the BT Wireless division. This was spun off from the BT Group in 2002 to form a new holding company, mmO2 plc, which introduced the new "O2" brand for the businesses. In 2005, mmO2 plc was renamed O2 plc. O2 plc was purchased by the Spanish telecommunications company Telefónica in 2006 for £18 billion. Under the terms of the acquisition, Telefónica agreed to retain the "O2" brand and the company's UK headquarters. O2 plc became Telefónica
State Grid Corporation of China State Grid Corporation of China The State Grid Corporation of China (SGCC; ), commonly known as the State Grid, is the state-owned electric utility monopoly of China. It is the largest utility company in the world, and as of 2018, the world's second largest company overall by revenue. In 2016/17 it was reported as having 927,839 employees, 1.1 billion customers and revenue of 363.125 billion dollars. After the electricity "Plant-Grid Separation" reform in early 2002, the assets of State Electric Power Corporation (国家电力公司) were divided into the five "power generation groups" that retained the power plants and five regional subsidiaries