SEWilco writes: Through the AdWords blog, they've announced "retargeting". If you click on an ad, a cookie can be set which allows AdWords to show you more ads for that site. If you don't buy, you might see more ads elsewhere for that web site which you clicked on. It's not deja vu, it's what happens when something is changed.
egrep patterns are full regular expressions; it uses a fast deterministic
algorithm that sometimes needs exponential space.
-- unix manuals