TELECOM Digest OnLine - Sorted: Re: Computer "Logic" in 1922 Panel Switching

Re: Computer "Logic" in 1922 Panel Switching

Jim Haynes (
Fri, 18 Aug 2006 02:03:17 GMT

Also I believe it was exposure to telephone switching apparatus that
led Claude Shannon to realize that Boolean algebra could be useful for
describing and analyzing switching circuits.

A book "The Design of Switching Circuits" by some Bell Labs guys
Keister, Ritchie and Washburn is something of a cookbook of relay
circuits for various purposes. Then at the end of the book they
introduce some of Shannon's insights for circuit analysis and design.
Shannon's work applied to combinatorial circuits; later it was Huffman
who worked out the application to sequential circuits.


jhhaynes at earthlink dot net

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