We've worked closely with the (center) to create an interactive online experience with powerful search and browsing tools, so that users can explore Mr Mandela's inspiring life story.

CNN: Digital Mandela archive spreads message of social justice

If you have Internet Explorer 7 or above, go to 'Tools' and then 'Delete Browsing History...

BBC: Your guide to the BBC Embedded Media Player

Widget makers say the collection of users' Web-browsing activity is an unintended side effect of how the tools work.

WSJ: 'Like' Button Follows Web Users