Could an individual describe the process of Electro-Discharge Machining (EDM) to me?

Query by >No Name<: Could an individual describe the approach of Electro-Discharge Machining (EDM) to me?
Not a lot is on wikipedia. Could you describe the procedure of this non traditional machining method and name two benefits and disadvantages of it if you can. Thanks very significantly.

Ideal answer:

Answer by thresher
http://en.wikipedia.org/wiki/Electrical_discharge_machining

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