[figmentPez]

There needs to be sub-categories for the living dead (I'd call them supernatural zombies). I don't watch horror movies, but from what people have told me, is that sometimes it's a "hell is full, so the dead walk the earth" thing and everyone comes back as a zombie, even if they died of natural causes, even if they'd been dead long before the zombie plague began.

Others have only the newly dead rising, or only those who were killed by zombies, or only those who were bitten by zombies, but didn't have their brains eaten, or...

Also, there are the zombies that act as manservants to vampires. I think they eat the flesh of the living in most mythologies, but they're not infectious and sometimes not mindless.

Then there are magical zombies that don't feed on the flesh of the living. Examples: Mr. Slant and Reg Shoe from the Discworld novels, The Post and other servant zombies from Planescape: Torment, the nameless zombie from the webcomic Hanna is Not a Boy's Name. Some of these aren't mindless, but they're all definitely undead.

EDIT: Also, can't forget head-crab zombies. I guess that could sorta get lumped into the virus category, if we just expand that to parasite zombies in general.

EDIT2: And cyber-zombies. There's some overlap with supernatural zombies, like in doom, but other times it's pure pseudo-science that brings back the dead, like Frankenstein's monster.

EDIT3: Where do Black Lantern zombies fit in? Are they supernatural or science-based zombies?