nd
over, picking an "unvisited" person, retrieving their friend list
and adding friends we have not seen to our list for a future visit.<br />
<br />
We also track how many times we have seen a particular friend in the
database to get some sense of "popularity".<br />
<br />
By storing our list of known accounts and whether 
we have retrieved the account or not, 
and how popular the account is in a database on the disk
of the computer, we can stop and
restart our program as many times as we like.<br />
<br 