Bus mouse
A bus mouse is a variety of PC computer mouse which is attached to the computer using a specialized interface.
In the late 1980s, mice were not integrated with IBM-compatible personal computers, and the specialized bus interface was one of two popular ways to connect a mouse. When the IBM PS/2 was introduced, it included a motherboard mouse interface which was integrated with the keyboard controller ; this fairly quickly drove the bus mouse design out of the marketplace.
The bus mouse lived on in the NEC PC-98 family of personal computers in Japan.
