Works For Us ... (Score 3, Informative)

Several years ago we here at NASA replaced Solaris X86 with Red Hat Linux as the operating system for our PCS systems (Thinkpad laptops used as the crew interface in the Space Station's command and control systems) We are currently in the process of rehosting again, this time to Scientific Linux, a CentOS-like rebuild of RHEL done by the good folks up at the Fermi National Accelerator Laboratory. Certainly cost was a factor, but not the deciding one. From our perspective it is golden not to have to track how many laptops each of the various development groups (many of which are international) have it loaded on.