The scientific research program of Cybernetics, originated by Norbert Wiener, 
was mainly concerned with the communication and control 
whether in living organisms or machines. 
The main aim was to get useful and essential information 
on the functioning of the brain  on which to construct later a science 
of the mind. This requires methods and knowledge borrowed 
from different disciplines including Physics, Biology, and Humanities.
The great novelty of Cybernetics was the introduction 
of a new entity called `information' of fundamental importance 
in the theory of communication. However, several different formalizations 
of the intuitive notion of information exist
which  depend on the `context', i.e., the characteristic features
of the `source', of the `channel', and of the `receiver'.  
The context is of a particular relevance in the study of biological systems 
where there exist sophisticated  coding mechanisms 
which are essential to the information processing, 
and underlie the high level functions of human mind. 
At present, still lacking is a theory of information and coding 
that could be usefully employed for the study of complex biological systems. 
This was  the main reason for the decline of Cybernetics.