OS usage statistics

I was puzzled now with the question: "And what kind of operating systems are used in American universities as a hosting platform?". I scratched my head and went to Netcraft’s website. I made a sample of the .edu domain (500 sites) and what I got as a result: 378 sites turned out to be well-known OS, the rest was in the “I do not know” zone. Of the known Linux, it takes 44.18%, Solaris - 27.51%, Windows - 24.07%, FreeBSD - 1.85%, Mac OS X - 0.79%, AIX and Tru64, 0.53% each, NetBSD and OpenBSD at 0.26%.



Interesting "picture".



And now the same thing, but with a picture (at the request of the workers):