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INCITS 367-2003 (S2018)
Information technology - SCSI Parallel Interface - 5 (SPI-5)
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]