Linux is the operating system installed on over 99% of the worlds most powerful computers
Google uses a version of Ubuntu internally nicknamed Goobuntu.
Germany has announced that 560,000 students in 33 universities will migrate to Linux.
IBM does extensive development work for Linux and also uses it on desktops and servers internally.
DreamWorks Animation has been using Linux since 2001, and has more than 1,000 Linux desktops and 3,000 Linux servers.
Wikipedia moved to running its servers on Ubuntu Linux in late 2008.
NASA has switched the International Space Station laptops to Debian Linux.
Both CERN and Fermilab use Scientific Linux in all their work; this includes running the Large Hadron Collider or the Dark Energy Camera or the 20,000 internal servers of CERN.
Brazil has 35 million students in over 50,000 schools using computers all running Linux