IBM 3174 Systems Network Architecture (SNA) controller

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Date Introduced
1994
Photographer
Richards, Mark
Dimensions
overall: 4 1/4 in x 15 3/4 in x 16 in
Manufacturer
International Business Machines (IBM)
Copyright Owner
© Mark Richards
Object ID
102716392

Introduced in 1974, SNA was IBM’s proprietary networking architecture connecting mainframe computers to peripheral devices like teleprinters and displays, and later to other computers. Initially fixed and hierarchical, it eventually became more dynamic. SNA was the dominant protocol in large companies for decades.