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November 05, 2009. Cary, North Carolina.. SAS, the largest private software company, makes a product called business intelligence or business optimization software, that looks for usable nuggets of information and insights in vast quantities of data. As the market for these types of products grows, SAS faces competition from some of the giants in the industry, such as Microsoft and IBM. The company differs from most in that it also provides many services for its employees, such as primary care doctors, daycare and a gym.  . In the Montessori preschool, a free service to employees with children, Mike Thorland (r) visits  his daughter Grace, 2nd from right, while head instructor, Meredith Furth  works with other children.