Screws Galore

In trying to look for an obscure screw online (I think a stainless #6, 1/4", beveled Phillips head; I need it to replace the one I stripped at the bottom of my shower door), I came across a page detailing all of the different types of screw heads.  I though Phillips was Phillips.  Wrong, apparently.  There are a ton of variations, along with some exotic ones that I've never seen or heard of.  

When A Phillips Is Not A Phillips