LinuxTag is the most important place for Linux and open source software in Europe. The 18th LinuxTag will take place on 23. – 26. May 2012 – for the sixth time at the Berlin Fairgrounds – and presents all the latest news and information for professional users, decision makers, developers, beginners and the Linux community. LinuxTag is organized by the LinuxTag Association in partnership with Messe Berlin GmbH.
See more: http://www.linuxtag.org/2012/en.html