User Agent String.Com 

User Agent String explained :

Opera 7.51
Opera	Name : Opera
7.51	Opera version
X11	X Window System a windowing system for bitmap displays
SunOS sun4u	Operating System: SunOS running on a sun4u
U	Security values: N for no security U for strong security I for weak security
de	Language Tag, indicates the language for which the client had been localized (e.g. menus and buttons in the user interface) de = German
First visit:	2009.02.21 01:29
Last visit:	2018.07.29 08:12
All Opera user agent strings