(Abbreviation for Small Computer Systems Interface) Small Computer Systems Interface introduced by the American National Standards Institute (ANSI ). A SCSI connects PC 's to Peripherals & to other PC's & LAN s. Up to 7 devices excluding the PC can be attached through a single SCSI connection, linking them together (known as a daisy chain). Only 1 device at a time can transmit through the SCSI connection - the devices are prioritised.