In the Big Physics community, Linux is quite popular. Having met with numerous groups, Linux almost always comes up as a topic of discussion and in many cases it’s part of their labs roadmap for rolling out control, test, and other systems. The first issue is cost. Microsoft Windows costs $100 or more for each computer and when you have hundreds of systems, it adds up to real money fast. The second issue is support. Some claim that almost any problem with Linux (seeking a driver, asking a technical question, etc.) can be found on Google since the Linux community is quite large.