"Microsoft Windows, a lower Total Cost of 0wnership"
http://www.immunitysec.com/downloads/tc0.pdf
0wner un serveur Windows coute donc effectivement moins cher :
"Immunity's findings clearly show that the best platform for your
targets to be running is Microsoft Windows, allowing you unparalleled
value for their dollar. This result reinforces the fact that its important
to consider more than just licensing fees when your targets choose
their OS. Indeed, a variety of factors go into their choice, and over
time, Windows has demonstrated itself to be the top contender in the,
in both the server and the desktop space for Total Cost of 0wnership."
