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Bluetooth – the great unifier. Back in the 90s the Bluetooth protocol was created so different electronics could talk wirelessly to one another. It’s named after a tenth-century king, Harald “Bluetooth” Gormsson, who unified a bunch of Danish tribes into a kingdom and no, that is not a joke. And it does precisely what its namesake did, but with electronics instead of tribes. Using the Bluetooth standard electronics such as computers, phones, speakers, PlayStation controllers, light bulbs, cars, and of course, earbuds can communicate.