Nearly half of the world's enterprises will be running mission-critical business applications on Linux by 2011. 

According to ComputerWorld, a Saugatuck Research survey among IT directors, vice-presidents and CIOs within 133 businesses worldwide indicated there would be a steep rise in Linux adoption from the end of this year.
Only 18% of businesses will be using Linux in business-critical roles by the end of 2007, states the survey, but this would grow by 40% from 2007 to 2009, and then accelerate to grow by 80% from 2009 to 2011.
The researchers say that recent Linux announcements and deals by Oracle and Microsoft have reinforced the long-preached message by the likes of IBM that open source, and especially Linux, is "enterprise-grade".