Useragentstring example:
Mozilla/4.0 (compatible; MSIE 5.0; Windows NT;)
Mozilla/4.0 (Windows; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 2.0.50727)
Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0; Trident/4.0; GTB5; SLCC1; .NET CLR 2.0.50727; Media Center PC 5.0; .NET CLR 3.0.04506; InfoPath.2; OfficeLiveConnector.1.3; OfficeLivePatch.0.0)
Mozilla/4.0 (Mozilla/4.0; MSIE 7.0; Windows NT 5.1; FDM; SV1; .NET CLR 3.0.04506.30)
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.0.3705; .NET CLR 1.1.4322; Media Center PC 4.0; .NET CLR 2.0.50727)
Mozilla/4.0 (compatible; MSIE 5.0b1; Mac_PowerPC)
Mozilla/2.0 (compatible; MSIE 4.0; Windows 98)
Mozilla/4.0 (compatible; MSIE 5.01; Windows NT)
Mozilla/4.0 (compatible; MSIE 5.23; Mac_PowerPC)
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; GTB6; Ant.com Toolbar 1.6; MSIECrawler)
Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0; Trident/4.0; SLCC1; .NET CLR 2.0.50727; .NET CLR 1.1.4322; InfoPath.2; .NET CLR 3.5.21022; .NET CLR 3.5.30729; MS-RTC LM 8; OfficeLiveConnector.1.4; OfficeLivePatch.1.3; .NET CLR 3.0.30729)
Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)
Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0; SLCC2; Media Center PC 6.0; InfoPath.3; MS-RTC LM 8; Zune 4.7)
Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; Trident/6.0)
Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; WOW64; Trident/6.0)
Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.2; Win64; x64; Trident/6.0)