Obsolete is a no longer existing design compagny. They did make a lot of stuff, this site shows work which was not published under the Obsolete name, but it is from Obsolete. And this is also the path to the official Obsolete website.
Backspace was a concept of Obsolete, now Backspace is on it's own but this is still a part of the Backspace-history. So you have to take a look at this.