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A lytch gate.
Oops.. I meant this:
http://forums.relicnews.com/avatars/avatar10881_1.gif
you hit it very hard on a gate card
An OR gate is a digital logic gate.
If one or both of the inputs to the gate are "1", then the ouput of the gate will be "1" .
If both of the inputs to the gate are "0" then the output of the gate will be "0".