Fun little game/test:
http://www.sporcle.com/games/videogame_systems.php
I did pretty good, 41 without cheating and looking anything up
*******SPOILER ALERT********
It's fun, but has flaws - SMS 2 should not be on the list (unless you get to include Genesis 2 & 3, SNES 2, etc.), or anything that plays the same cartridges/CD's as something else (GBC, Turbo Express, Nomad).