Around the world, about 750 million people – one out of every 10 – still don’t have access to electricity. But for the 90% who do, there are 15 different types of domestic electrical outlet ...

There are 15 plug and outlet designs in common usage around the world today. These use a lettering system developed by the International Trade Administration (ITA), with letters denoting the style ...

And, depending on where you are in the world, you may have a vastly different image pop in your head when you picture one. Some have two prongs (also called pins), others have three.