According to ANSI X3.131，SCSI means small computer system interface. It is a parallel interface standard used by Apple Macintosh computers, PCs, and many UNIX systems for attaching peripheral devices to computers.
SCSI interface is a local bus type interface for connecting multiple devices (up to eight), designated as either initiators (drivers) or targets (receivers).SCSI interfaces provide for faster data transmission rates (up to 320 mbps ) than standard serial and parallel ports. In addition, you can attach many devices to a single SCSI port, so that SCSI is really an I/O bus rather than simply an interface.
Common SCSI devices
Hard Drives with SCSI I. SCSI II, SCSI III interface
CD/DVD ROM with SCSI HD 50. SCSI HD68 interface
Scanners with SCSI I. SCSI II interface
Tape Drives with SCSI HD 50. SCSI HD68 interface
Zip Drives with SCSI HD 50. SCSI HD68 interface
Removable Drives with SCSI HD 50. SCSI HD68 interface
Printers with SCSI HD 50. SCSI HD68 interface
SCSI chain – a series of SCSI devices working together through a host adapter
SCSI card or SCSI Host Adapter – comes as a PCI or ISA and has an internal and external connector that would connect to a device
Starte can make all the SCSI items from the Picture, OEM is welcomed.