Even the iconic Bluetooth logo pays homage to King Harald, blending two runes from the Younger Futhark alphabet: ᚼ (H) and ᛒ (B)—Harald Bluetooth's initials. READ MORE: Apple TV's chilling ...

It's been around for 20 years. We see the name and iconic logo on virtually every device we own - Bluetooth headphones, Bluetooth speakers, even Bluetooth-enabled toothbrushes. As is the case ...

The distinctive Bluetooth logo also has ties to the Viking ruler ... These runes were used in Old Norse inscriptions and appear on historic relics such as the Jelling stones, a set of carved ...