The biggest is in security servers, where Linux systems cost $91,000 over five years and Windows systems cost $70,000.

Next comes print jobs, where a Linux server cost $107,000 over five years and a Windows server cost $87,000.

In file sharing, Linux cost $114,000 to Windows' $99,000.

In Web site jobs, Linux was less expensive at $31,000 to Windows' $32,000.

Windows is cheaper in the long run.