Fun little game/test:

http://www.sporcle.com/games/videogame_systems.php

I did pretty good, 41 without cheating and looking anything up

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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).