Please do not allow this tag to live!
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There are too many things that use "edge" in it's name, and the system isn't smart enough to know if it will be really useful. Examples:

 - Ubuntu-edge, the operative system.
 - Edge of the monitor/tablet/screen/etc.
 - Thinkpad edge, 
 - Edge swapping, a effect of compiz
 - EDGE (Enhanced Data Rates for GSM Evolution) the digital mobile technology
 - Edge, of a window.
 - Others "edge"s of anything...

Because of this, this tag should be avoided/nuked.

If tags are needed to contain "edge" they should use the hyphen (-), example:

 - [tag:thinkpad-edge] (I really do not make too much sense of this one... someone might)
 - [tag:EGPRS] and in the excerpt/wiki say that is also know as EDGE
 - no other case scenario where "edge" could be useful for looking at question/answer, and won't give headaches later.