Bluetooth

 Bluetooth Special Interest Group is the standards organisation that oversees  the development of
Bluetooth standards and the licensing of the Bluetooth technologies  and trademarks to manufacturers.

The origin story of the name and logo for the Bluetooth wireless technology standard is an unusual one. This technology that is now commonly used in smartphones, computers and many other devices allows for the exchange of data over short distances.

Bluetooth is managed by the Bluetooth Special Interest Group (SIG) which oversees development of the specification, manages the qualification program, and protects the trademarks.

The name goes back to the 10th century and a Danish King Harald Blatand. King Harald united warring factions in Norway, Sweden, and Denmark under one banner. This was the symbolism in mind when developers of the Bluetooth signal chose the King's name for their technology that could unite many different forms of technology—cars, computers, and mobile phones—under one communications network.

The name Bluetooth is an Anglicised version of the Scandinavian Old Norse Blåtand the epithet of King Harald. The name was proposed in 1997 by Jim Kardach of Intel who had developed a system for mobile phones to communicate with computers, and at that time he was reading the historical novel The Long Ships which is about Vikings and King Harald.

The Bluetooth logo is a ligature of two Runes:
the Runic letter ᚼ (Hagall) and
Runic letter ᛒ (Bjarkan), which are King Harald's initials