LSI 20860 - Manual (Page 26)

A-4 Glossary of Terms and Abbreviations
Single-Ended
SCSI A hardware specification for connecting SCSI devices. It references each
SCSI signal to a common ground. This is the most common method (as
opposed to differential SCSI which uses a separate ground for each
signal).
Termination The electrical connection required at each end of the SCSI bus,
composed of a set of resistors. It improves the integrity of bus signals.
Ultra SCSI A standard for SCSI data transfers. It allows a data transfer rate of up to
20 Mbytes/s over an 8-bit SCSI bus and up to 40 Mbytes/s over a 16-bit
SCSI bus. The SCSI Trade Association (STA) supports using the term
“Ultra SCSI” over the term “Fast-20”.