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Red Hat Linux 6.2 17,000,000
Red Hat Linux 7.1: 30,000,000
Debian 2.2: 56,000,000
Sun Solaris: 7,500,000
Windows 3.1 3000,000
Windows NT 4000,000
Windows 95 15000,000
Windows NT 4.0 16000,000
Windows 98 18000,000
Windows NT 5.0 20000,000
Windows 2000 35000,000
Windows XP 40000,000