User Agent String explained :
 Internet Explorer 6.0 | |
|---|---|
| Mozilla | MozillaProductSlice. Claims to be a Mozilla based user agent, which is only true for Gecko browsers like Firefox and Netscape. For all other user agents it means 'Mozilla-compatible'. In modern browsers, this is only used for historical reasons. It has no real meaning anymore | 
| 4.0 | Mozilla version | 
| compatible |  Compatibility flag  Indicates that this browser is compatible with a common set of features  | 
| MSIE 6.0 | Name :  Internet Explorer version 6.0 | 
| Windows NT 4.0 | Operating System:   Windows NT | 
All Internet Explorer user agent strings  | |
Internet Explorer 6.0