usiness unitsIn addition to its twelve brands, General Motors holds a 20% stake in IMM, and a 77% stake in GM Korea. It also has a number of joint-ventures, including Shanghai GM, SAIC-GM-Wuling, and FAW-GM in China, GM Uzbekistan, General Motors India, General Motors Egypt, and Isuzu Truck South Africa. General Motors employs 212,000 people and does business in more than 140 countries. General Motors is divided into four business segments: GM North America (GMNA), GM International Operations (GMIO), Cruise, and GM Financial.:12, 13The company also operates a mobility division called Maven, which operates car-sharing services in the United States, and is studying alternatives to individual vehicle ownership.GM Defense is General Motors' military defense division, catering to the needs of the military for advanced technology and propulsion systems for military vehicles.General Motors led global annual vehicle sales for 77 consecutive years f rom 1931 through 2007, longer than any other automaker, and is still among the world's largest automakers by vehicle unit sales.General Motors acts in most countries outside the U.S. via wholly owned subsidiaries, but operates in China through ten joint ventures.:18, 96 GM's OnStar subsidiary provides vehicle safety, security and information services.In 2009, General Motors shed several brands, closing Saturn, Pontiac, and Hummer, and emerged from a government-backed Chapter 11 reorganization. In 2010, the reorganized GM made an initial public offering that was one of the world's top five largest IPOs to date, and returned to profitability later that year.HistoryFurther inform