90
Power socket types around the world
(upload.wikimedia.org)
For the map enthused!
Rules:
post relevant content: interesting, informative, and/or pretty maps
be nice
One of the reasons for it is contraband, imports and local industries. If as a government, I want to impulse local industry and hurt contrabands, getting an electric socket exclusive for my country, that local regulations enforce, is an easy measure to use.