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

I would have guessed pretty different precentages..

I came across this Microsoft-supplied graphic in a Lifehacker story yesterday:

Microsoft says that the above is the relative proportion of power sucked up on the typical Windows laptop.  I think I would have guessed that the panel uses the most (I wonder how much LED backlighting changes this?), but I wouldn't have guessed the chipset would use more than twice what the CPU uses.  Perhaps this is due to the SpeedStep (Intel)/PowerNow (AMD) CPU throttling?  I also would definitely not guessed that the chipset sucks up 4x the power of the hard drive (I might have put that 2nd or 3rd when guessing)..