Centronics-style: A type of connector first popularized by the Centronics Corporation. Notable for the trapezoidal shape of its attachment area.

Chain: A linking of one or more SCSI devices to a computer. Sometimes also called a daisy chain. There can be only one chain per computer, and each device can belong to only one chain.

Terminator: A device placed at the end of a SCSI chain to keep data from "bouncing" back up after it's been transmitted the length of the chain. Some terminators are external, while some devices feature built-in termination.

2torial #0431: Learn2 Connect External SCSI Devices (Macintosh OS) - Continued Set the ID numbers   Somewhere, on almost all external devices, there is a means of mechanically setting the SCSI ID number. Generally, there's a small numeral on the back of the device set between two push tabs; push one tab and the numeral is reduced by one, push the other and the numeral is increased by one. Sometimes the numeral is hidden by a sliding door, and on some cheaper devices the numeral is permanently set, and cannot be changed. What you want to do is: First determine the order in which you would like to connect your devices, from your computer to the first one and then from one to another. Next, for best results, set the device first in line from the computer to a low ID number, then set each additional device to a higher number than the one before it. Don't worry too much if sequential numbering is not possible, everything will probably work just fine as long as no numbers are duplicated. Keep in mind that some devices, notably scanners and older CD-ROM drives, can be temperamental. They should be placed at the end of the chain (farthest away from the computer, hopefully with the highest number). Step 2