S-Net was a network operating system

Network operating system

A networking operating system , also referred to as the Dialoguer, is the software that runs on a server and enables the server to manage data, users, groups, security, applications, and other networking functions...

 and the set of network protocols it used to talk to client machines on the network. Released by Novell

Novell

Novell, Inc. is a multinational software and services company. It is a wholly owned subsidiary of The Attachmate Group. It specializes in network operating systems, such as Novell NetWare; systems management solutions, such as Novell ZENworks; and collaboration solutions, such as Novell Groupwise...

 in 1983, the S-Net operating system was an entirely proprietary operating system written for the Motorola 68000

Motorola 68000

The Motorola 68000 is a 16/32-bit CISC microprocessor core designed and marketed by Freescale Semiconductor...

 processor. It used a star network topology

Network topology

Network topology is the layout pattern of interconnections of the various elements of a computer or biological network....

.

S-Net has also been called NetWare 68, with the 68 denoting the 68000 processor. It was superseded by NetWare 86

Novell NetWare

NetWare is a network operating system developed by Novell, Inc. It initially used cooperative multitasking to run various services on a personal computer, with network protocols based on the archetypal Xerox Network Systems stack....

, which was written for the Intel 8086

Intel 8086

The 8086 is a 16-bit microprocessor chip designed by Intel between early 1976 and mid-1978, when it was released. The 8086 gave rise to the x86 architecture of Intel's future processors...

processor, in 1985.