For access to this article, please select a purchase option:
Buy article PDF
Buy Knowledge Pack
IET members benefit from discounts to all IET publications and free access to E&T Magazine. If you are an IET member, log in to your account and the discounts will automatically be applied.
This week we weigh up the battle between My Space and Facebook and we give you some insider tips on how to restore your digital memories - after you've hit the delete button!