In 1992, Intel introduced the Peripheral Component interface bus specification. PCI, a high-speed interconnection system that runs at processor speed, became compatible with the VL bus by its second release in 1993. PCI includes a 64-bit data bus and accommodates 32-bit and 64-bit expansion implementations. PCI is designed to be processor-independent and is used in most high-speed multimedia systems. PCI is designed so that all processors, co-processors, and support chips can be linked together without using glue logic and can operate up to 100 MHz, and beyond. PCI specifies connector pinout as well as expansion board architecture.