The word 'cybernetics' is still new to many people, even though it has now been an accepted word of our language for some ten or fifteen years. Speak… - Frank Honywill George

This book an attempt will be made to outline the principles of cybernetics and relate them to what we know of behaviour, both from the point of view of experimental psychology and also from the point of view of neurophysiology.

The sudden recent rise to prominence of cybernetics was due, immediately, to World War II. There existed then a series of problems which had not previously been met. The main one was that of range-finding for anti-aircraft guns in high-speed aerial warfare. The older systems involved human computers and these, with manually controlled locators, were wholly inadequate for the job in hand. The essence of the process involved was to track and predict the direction, velocity, and height of enemy aircraft. The human being's part in the operation was much too slow and inaccurate, and there were people available with machines already developed to do the job adequately; these machines were, of course, computing machines.

The main object of cybernetics is to supply adaptive, hierarchical models, involving feedback and the like, to all aspects of our environment. Often such modelling implies simulation of a system where the simulation should achieve the object of copying both the method of achievement and the end result. Synthesis, as opposed to simulation, is concerned with achieving only the end result and is less concerned (or completely unconcerned) with the method by which the end result is achieved. In the case of behaviour, psychology is concerned with simulation, while cybernetics, although also interested in simulation, is primarily concerned with synthesis. Most of the major developments in models and theories of artificial intelligence have taken place in the western world — mostly, indeed, in the US and Britain — and it was only relatively recently that "core developments", as opposed to more peripheral developments and applications, have spread over Europe and the Soviet Union.