PageRank
<p>Dec 10, 2007 8:52 PM
PageRank  (named (perhaps) after Larry Page, who developed it at Stanford (which holds the patent)) is
this ...  HOW MANY AUTHORITIES POINT TO YOU (AND HOW MIGHTY ARE THOSE AUTHORITIES)).
So, if you've got lots of very important websites pointing to you, then you will become important.
Google takes the LOG of this measure and maps it from 0 to 10 like the Richter Scale.</p>