"For Q2 2008 (the IT sector not in decline yet): Windows had a
YoY gain of revenue of 1.38% (with market share down to 36.5% from
38.2 one year earlier), UNIX gained 8.22% (market share up to 32.7%
from 32.06%) and GNU/Linux had a revenue gain of 4.55% (market
share down to 13.4% from 13.6%). GNU/Linux + UNIX make up 46.1% of
revenue market share."