Q-Bus: A backplane bus used on the now obsolete PDP and MicroVAX computer systems developed and sold by DEC [Digital Equipment Corporation]. Most PDP systems were obsolete by the end of the 1980's, but the MicroVAX systems were used well into the 1990's. In fact smaller companies might still be using the MicroVAX computers, but getting spare parts might pose a real problem.

QuickPath Bus: An Intel uP interface, known internally as the Common System Interface (CSI), is explicitly designed to accommodate integrated memory controllers and distributed shared memory. QuickPath is a point-to-point processor interconnect being developed by Intel for their new generation processors.

QuickRing Bus: The QuickRing interface is an offshoot of SCI. QuickRing uses six data signals and a clock speed of 175 MHz to achieve a throughput of 200 MBytes/second/link. The six data signals use the SCI P1596.3 Low Voltage Differential Signaling (LVDS) protocol for low power dissipation and low noise immunity. The QuickRing bus is OBSOLETE, not even sure it reached the market place.

An alphabetic listing of released [or obsolete] interface buses. Primarily the links point to pages that describe the physical and electrical interfaces, and include information about component and equipment vendors. Interface Bus protocols are normally not addressed.