An Introduction to Cybernetics

W. Ross Ashby, "An Introduction to Cybernetics"
Chapman and Hall | 1957 | ASIN: B00127ILRY | 295 pages | PDF | 1,8 MB

From preface:
The book is intended to provide such an introduction. It starts
from common-place and well-understood concepts, and proceeds,
step by step, to show how these concepts can be made exact, and
how they can be developed until they lead into such subjects as
feedback, stability, regulation, ultrastability, information, coding,
noise, and other cybernetic topics. Throughout the book no
knowledge of mathematics is required beyond elementary algebra;
in particular, the arguments nowhere depend on the calculus
(the few references to it can be ignored without harm, for they are
intended only to show how the calculus joins on to the subjects
discussed, if it should be used). The illustrations and examples are
mostly taken from the biological, rather than the physical, sciences.
Its overlap with Design for a Brain is small, so that the two
books are almost independent. They are, however, intimately
related, and are best treated as complementary; each will help to
illuminate the other.

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