Xerox Corporation /?z??r?ks/ (also known as Xerox, stylized as xerox since 2008, and previously as XEROX from 1960 to 2008) is an American global corporation that sells business services and document technology products. Xerox is headquartered in Norwalk, Connecticut (moved from Stamford, Connecticut in October 2007), though its largest population of employees is based around Rochester, New York, the area in which the company was founded. The company purchased Affiliated Computer Services for $6.4 billion in early 2010. As a large developed company, it is consistently placed in the list of Fortune 500 companies.