Code:
[U][B]Operating System Requests Percent[/B][/U]
Windows 3,469,687 81.78%
Mac 327,753 7.73%
iPhone 116,311 2.74%
Linux 107,158 2.53% (including Android)
iPad 31,506 0.74%
BlackBerry 17,028 0.40%
SymbianOS 7,926 0.19%
DoCoMo 449 0.01%
SunOS 368 0.01%
FreeBSD 347 0.01%
[U]OpenBSD 26 0.00%[/U]
[B]Total 4,242,653 100.00%[/B]
SOURCE: http://stats.wikimedia.org/archive/squid_reports/2011-03/SquidReportOperatingSystems.htm