Historical
ANSI INCITS 367-2003
Information technology -SCSI Parallel Interface-5 (SPI-5)
This standard defines the mechanical, electrical, timing, and protocol requirements of the SCSI parallel interface to allow conforming SCSI devices to inter-operate. The SCSI parallel interface is a local I/O bus that may be operated over a wide range of transfer rates.
InterNational Committee for Information Technology Standards [incits]