Machine aid for switching circuit design [Bell Monograph]

Bell Telephone Systems Monograph Series (#2153: March 1954). This paper describes a purpose-built machine (the relay circuit analyzer) that can remove unnecessary components while testing a circuit against its design requirements. The circuit analyzer design, while extensible, has a straightforward design and is explained using the simplest case. Documents like this represent the "golden age" of Bell Labs, where many of the fundamental components of modern computing and telecommunications were first engineered. PROVENANCE: The personal files of Claude E. Shannon (unmarked), acquired by Kuenzig Books. REFERENCES: Sloane and Wyner, "Claude Elwood Shannon Collected Papers," #80 Hook and Norman, "Origins of Cyberspace," #886 . First separate edition. 9" - 12".