This report is pretty cool. The emphasis was added by myself.
The open source software phenomenon has spread far beyond Linux and is gaining enormous momentum, according to an IDC study of over 5,000 developers in 116 countries, representing 38 developer networks. The analysts found open source software being used by 71 percent of the developers in the world and in production at 54 percent of their organisations. Half of the global developers claim that the use of open source is increasing in their organisations.
The study declares that open source software represents the most significant all-encompassing and long-term trend that the software industry has seen since the early 1980s. IDC believes that open source will eventually play a role in the life-cycle of every major software category, and will fundamentally change the value proposition of packaged software for customers.