[D1] Bluetooth is a short range communication technology that replaces cables connecting portable units and maintaing high security levels.
It's a short range of standards to exchange data between fixed and mobile deevices in short distances via UHF radio waves
[D1] The name is from Scandinavian origins of the tech, named after a 10th century Danish Viking, King Harald Blätand (Blätand means “Bluetooth” in English).
Legend says he liked eating blueberries such that his teeth got stained with the fruit's color fruit, hence his name.
Since he united Denmark, Sweden, and Norway, he was associated with uniting efforts, hence the association of uniting devices via Bluetooth
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