The Physics of Information
F. ALEXANDER BAIS AND J. DOYNE FARMER

The notion of information as used by Shannon is a generalization of
the notion
of entropy, which _rst appeared in thermodynamics.
 In thermodynamics entropy is an abstract quantity depending on heat
and
temperature whose interpretation is not obvious.
 . . . .
 It turns out that the concept of entropy or equivalently information
is useful
in many applications that have nothing to do with physics
.
http://arxiv.org/pdf/0708.2837v2.pdf

=====.
#
The mathematician  John von Neumann said to
"the father of information theory" Claude Shannon:
 " Name it "entropy"  then in discussions
 you will receive solid advantage, because
nobody knows, what "entropy"  basically is ".
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