Wearable technology has been around a long time, in 16th century China the Qing Dynasty saw the introduction of a fully functional abacus on a ring. However the first wearable digital computers weren't seen till the 1980's, although these were mostly unsuccessful. The first watch phone debuted in 1999 but it wasn't until the late 2000's that we began to see more advanced wearable technology. These advances were made possible by improved battery and display technology as well as vastly aided by new interface standards such as Bluetooth. These early wearable computers would go on to shape the modern smart wearables available today.