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.

Bluetooth wireless technology is an international open standard for allowing intelligent devices to communicate with each other over short range wireless links. It allows any sort of electronic equipment - from computers and cell phones to keyboards and headphones - to make its own connections, without wires, cables or any direct action from a user.