These icons are social bookmark links to sites that allow you to store, tag and share links and then access them from any computer.
If you want to save any of the info on this site for future reference, or share it with others, just click on one of these links to add it to your list.
All of these sites are free to use, but you need to register - then you can begin bookmarking. Each site works slightly differently, so use the following links to find out which you like.
Del.icio.us
Register at: http://del.icio.us/register
For more info, go to:
http://del.icio.us/about
Digg
Register at: http://digg.com/register
For more info, go to:
http://digg.com/about
reddit
Register at: http://reddit.com/login
For more info, go to:
http://reddit.com/help/faq
Facebook
Register at: https://register.facebook.com/r.php
For more info, go to:
http://www.facebook.com/about.php
StumbleUpon
Register at: http://www.stumbleupon.com/sign_up.php
For more info, go to:
http://www.stumbleupon.com/about.html