SCSI (Small Computer System Interface) was used to physically connect two computers to peripheral devices and transfer data between them. SCSI was used to connect hard disk drives, tape drives, scanners, CD drives, and other devices. SCSI is pronounced “scuzzy.”
The examples shown here include both an unopened cable in the 1992 packaging and an opened example that I found in an AppleCD 300e Plus (1995) box.
I remember using an Apple SCSI System Cable to connect external Apple CD-ROM drives, scanners, and hard drives. The thickness of the cable made it difficult to bend and contributed to a high failure rate.