15 Types of domestic electrical outlet plugs are currently in use worldwide,
each of which has been assigned a letter by the US Department of Commerce International Trade Administration (ITA),
starting with A and moving through the alphabet.
These letters are completely arbitrary: they don’t actually mandate anything.
Click here for a global map showing the spread of the different plug types used around the world.
Click here for a detailed list of the countries of the world with their respective plug and outlet types, voltage and frequency.