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A comment on The Little Book of Semaphores.

Re:The Little Book of Semaphores by rullopat on Wednesday August 20, 2014 @04:12AM (#8201488)
Isn't it the same book?

http://greenteapress.com/semaphores/

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Re:The Little Book of Semaphores by Pyrodogg on Wednesday August 20, 2014 @09:22AM (#8202188)
Yes. The PDF link in the original article links to the same PDF on this page.
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