Inc.com (08/21/12) Leigh Buchanan
According to Inc.com, companies that made the 2012 Inc. 500 list share two qualities: guts and optimism. Many of the companies on the list launched in 2008 during the recession. The 2012 list measures revenue growth from 2008 through 2011. The companies in the Inc. 500 represent the top tier of the Inc. 5,000. Many of the staffing firms among the Inc. 5,000 are listed here.