INSIGHT - 2010 list of largest U.S. staffing firms
*92 firms break $100 million barrier in 2009
*Allegis remains largest, but Adecco's acquisition of MPS narrows the gap
*Less cyclical PEOs climb the list in recessionary 2009 

INSIGHT - 2010 list of largest U.S. office/clerical staffing firms
*16 firms exceed $100 million in office/clerical
*Kelly Services continues to be largest
*The 16 largest make up more than half the market

INSIGHT - 2010 list of largest U.S. legal staffing firms
*Six firms over $25 million in legal
*MPS acquisition makes Adecco largest in legal
*Kelly Services climbs from fourth to second