User Agent String.Com 

User Agent String explained :

Opera 8.51
Opera	Name : Opera
8.51	Opera version
X11	X Window System a windowing system for bitmap displays
U	Security values: N for no security U for strong security I for weak security
Linux i686	Operating System: Linux running on a Intel Pentium Pro CPU
en-US	Language Tag, indicates the language for which the client had been localized (e.g. menus and buttons in the user interface) en-US = English - United States
rv:1.8	CVS Branch Tag The version of Gecko being used in the browser
Last visit:	2018.07.04 10:50
All Opera user agent strings