Another lineage among Go’s ancestors, and one that makes Go distinctive among recent programming languages, is a sequence of little-known research languages developed at Bell Labs, all inspired by the concept of communicating sequential processes (CSP) from Tony Hoare’s seminal 1978 paper on the foundations of concurrency. In CSP, a program is a parallel composition of processes that have no shared state; the processes communicate and synchronize using channels. But Hoare’s CSP was a formal language for describing the fundamental concepts of concurrency, not a programming language for writing
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