User Agent String.Com 

User Agent String explained :

Mozilla 1.0rc2
Mozilla	Name : Mozilla
5.0	Mozilla 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
AIX 005A471A4C00	Operating System: AIX Version 005A471A4C00 (Advanced Interactive eXecutive) UNIX based operating system developed by IBM
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:1.0rc2	CVS Branch Tag The version of Gecko being used in the browser For the Mozilla browser this is the browser version as well
Gecko	Gecko engine inside
20020514	Build Date: the date the browser was built
Last visit:	2018.07.28 08:31
All Mozilla user agent strings