I was looking up information on my Bluetooth handsfree piece for my phone and I came across this bit of information on Wikipedia:Bluetooth was named after a late tenth century king, Harald Bluetooth, King of Denmark and Norway. He is known for his unification of previously warring tribes from Denmark (including now Swedish Scania, where the Bluetooth technology was invented), and Norway. Bluetooth likewise was intended to unify different technologies, such as computers and mobile phones.Remember that for the next time you are on Jeopardy!.  I wonder how the good king got his last name in the first place!