Why is it called Bluetooth? This name has an origin. What is it?

the word "Bluetooth" is a Scandinavian word for Bl? tand / Bl? Tann (that is, old Norwegian blát? Nn), which is the nickname of Harald Bluetooth, a king in the 1th century. He unified the disputed Danish tribes into a kingdom, and it is said that he also introduced Christianity. The idea of naming Bluetooth after this was first put forward by Jim Kardach in 1997. Kardach developed a system that allows mobile phones to communicate with computers. He was inspired by The Long Ships, a historical novel written by Frans G. Bengtsson describing Viking and Harald Bluetooth King, which meant that Bluetooth would also unify communication protocols into global standards.

Bluetooth? ): is a wireless technical standard, which can realize short-distance data exchange between fixed equipment, mobile equipment and building personal area network (using UHF radio waves in ISM band of 2.4—2.485GHz). Bluetooth technology was first invented by telecom giant Ericsson in 1994 as an alternative to RS232 data line. Bluetooth can connect multiple devices, which overcomes the problem of data synchronization.

today, bluetooth is managed by the Bluetooth Special Interest Group (SIG). The Bluetooth Technology Alliance has more than 25, member companies in the world, which are distributed in many fields such as telecommunications, computers, networks, and consumer electronics. IEEE listed Bluetooth technology as IEEE 82.15.1, but now it no longer maintains this standard. Bluetooth Technology Alliance is responsible for supervising the development of bluetooth profile, managing certification projects and safeguarding trademark rights. The manufacturer's equipment must meet the standards of Bluetooth Technology Alliance before it can enter the market under the name of "Bluetooth equipment". Bluetooth technology has a set of patent network, which can be distributed to devices that meet the standards.