"Martin H. Eastburn" wrote:

http://en.wikipedia.org/wiki/AC_power_plugs_and_sockets

I'm not so sure on the definition of plug and jack you have.
One can have most anything made.

A board of 100 jacks and a phone lady plugging in plugs to make connections.
She was pushing a male plug into the female socket in the wall.

Extension cords have both plugs on one end and sockets on the other.


There are hermapoditic connectors, like 7 mm RF and Switchcraft 2501
series.


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