Identifying Graphics Cards

Dunno if this has ever happend to you but it has to me a couple of times...
If you find yourself on someone elses machine and you want to know what card
they've got installed with out having to open the case:

[1] Open a command prompt by typing "cmd" (2K/XP)
[2] type debug
[3] type dc000:0 100

It will now dump out some info about the card, the ammount of usefull
info depends on the card type, but you should easily get Make/Model/Release Date etc...