Abstract
Generalised by Clausius to all thermodynamic systems. After beinggiven a statistical basis by Boltzmann, entropy reappeared as ameasure ofinformation in Shannons mathematical theory of communication which lies atthe basis of much of todays technology. The two apparently distinct kindsof entropy / information turn out to be connected by Maxwells demon and itsdescendants. This talk will go over these themes and their relation toBayesian statistical inference.
