People across the country have had their mind blown after tech-savvy sleuths discovered the secret message behind the Bluetooth logo.
The technology has been in common use since it first appeared around 28 years ago, Daily Star reports.
It was named after King Harald “Bluetooth” Gormsson, who was able to bring Denmark and Norway together in the 10th century.
His nickname is believed to have come from his death tooth, which is said to have been dark blue or grey in colour.
Bluetooth was designed to allow data to be passed from one device to another at a short range without a physical connection.
The name was inspired by King Harald's ability to unify two nations, with the ideology being the same with the gadget, to bring things together.
At first, Bluetooth wasn't meant to mean anything more than a title for an internal code, while the technology was being developed.
But due to the other options failing to be unique enough or being unable to be patented in time for the release, the engineers decided to settle with the code name.
Bluetooth's logo also boasts significance, with it being a combination of King Harald's initials in "rune": ᚼ (Hagall) and ᛒ (Bjarkan), reports The Sun.
The king is best known for introducing Christianity to Scandinavia and at one point he ruled over what is now southern Sweden, northern Germany, Denmark and parts of Norway.
Some accounts imply that his oddly coloured tooth earned him his alternative moniker but others believe the nickname could have originated from his skin tone.
This is due to the word "Blaa", being the modern Danish word for "blue", but centuries ago the word actually translated to"dark-skinned".
While "Tan" has previously been confused with the modern Danish word for "tooth".
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