ARCNET
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Attached Resource Computer NETwork is a communications protocol for local area networks. ARCNET was the first widely available networking system for microcomputers and it became popular in the 1980s f
An ARCNET adapter for an Amiga 500 computer. The small card next to it is the size of a credit card.
Systems Network Architecture
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Systems Network Architecture is IBM's proprietary networking architecture, created in 1974. It is a complete protocol stack for interconnecting computers and their resources. SNA describes formats and
ARCNET
…the type of computers that would be connected. This was in contrast to contemporary larger and more expensive computer systems such as DECnet or IBM's SNA, where a homogeneous group of similar or proprietary computers were connected as a cluster. The token-passing bus protocol of that I/O device-sharing…
IBM 3745-170