London Stock Exchange begins migration to Linux-based trading platform (ComputerworldUK)

@stanford: Also, by claiming that Linux is used in a mission-critical environments running without reboot for years, you seem to believe that it's somewhat different from Windows. It's not - Windows is being used in mission-critical environments as well, including military ones. And, believe it or not, it doesn't need daily reboots either.

What I'm trying to say is, both systems work OK for most people. But for some they don't, requiring restarts.