HP is one of the largest information technology companies in the world, founded in 1939 and headquartered in Palo Alto, California, USA. HP has three business groups, namely Information Products Group, Printing and Imaging Systems Group and Enterprise Computing and Professional Services Group. China Hewlett-Packard Co., Ltd. is headquartered in Beijing, with branches in Shanghai, Guangzhou, Shenyang, Nanjing, Xi, Wuhan, Chengdu and Shenzhen. Hewlett-Packard Company of China has a global call center in Dalian and a production plant in Chongqing.