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SP-1 (Stored Program 1) was the name of a computerized telephone exchange (a so-called switching office) manufactured by Northern Electric (later Northern Telecom and now Nortel Networks beginning in 1972) in Canada. It was introduced in 1971.
Overview, Related Topics & Entities
Explore the main themes, entities and connections around SP-1 switch. Start with the topic map, then use the sections below for research and deeper semantic analysis.
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sp-1 switch program computer systems used switching digital service introduced previous generation fully analog two wire four operator stored exchange
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