Bluetooth is a wireless technology standard for exchanging data over short distances (using short-wavelength radio transmissions in the ISM band from 2400–2480 MHz) from fixed and mobile devices, creating personal area networks (PANs) with high levels of security. Bluetooth uses a radio technology called frequency-hopping spread spectrum, which chops up the data being sent and transmits chunks of it on up to 79 bands (1 MHz each; center...

A Bluetooth stack is software that refers to an implementation of the Bluetooth protocol stack. Widcomm was the first Bluetooth stack for the Windows operating system. The stack was initially developed by a company named Widcomm, which was acquired by Broadcom. The Microsoft Windows Bluetooth stack only supports external or integrated Bluetooth dongles attached through USB.