XNS (Xerox Network System)
Protocol suite originally designed by Xerox Corporation in late 1970’s. Many PC networking companies, such as 3Com, Banyan, Novell, and Ungermann-Bass Networks used or currently use a variation of XNS as their primary transport protocol.
XNS was designed to be used across a variety of communication media, processors and office applications.
UB, (now a part of Tandem Computers) adopted XNS in developing its Net/One XNS routing protocol.