The top IT services vendors had combined revenue in 2005 of $262 bln, a 1.9% increase from 2004, but well below the 8% boost in the overall market, Datamonitor said. The top 50 ranged from IBM Global Services with sales of $47 bln to Patni Computer Systems with $450 mln. The 10 fastest-growing IT services vendors included Cognizant, Satyam, Patni, TCS, Infosys, HCL and Wipro, SRA, CACI and SAIC.