Technology to connect electronic devices in a wireless way. In English it means blue tooth, and it was the nickname of the King Harald Blåtand (Haroldo the Dienteazul) who gathered in the S. X to the Danish tribes in the same crown, and he had the bluish denture to eat blueberries. As homage to its initials Rune 5820; (Hagall H) and 5842; (Berkana B) linked form the Bluetooth symbol.
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