How does Stack Overflow remember users' actions when they're not
logged in? Do they track IP addresses?  share|improve this
question Does it? (I wouldn't know, I'm always logged in anyway)
–  delnan Nov 16 '10 at 18:07 add comment  migrated from Nov 16
'10 at 18:28  This question came from our site for professional
and enthusiast programmers.  2 Answers  Tracking user actions
can be done using an IP address, but it is usually done with
cookies.  Data about the user is stored on the user's computer
in temporary Internet files. As long as the user doesn't
clear/disable them, this data can be used to keep track of user
information.  This is also how Stack Overflow knows who you are
and automatically logs you in when you haven't visited the site
for two days.  share|improve this answer add comment  They use a
database or the browser session.  share|improve this answer add
comment  You must log in to answer this question.