  In these notes we will give an overview and road map for a definition and
characterization of (relative) entropy for both classical and quantum systems.
In other words, we will provide a consistent treatment of entropy which can be
applied within the recently developed Orlicz space based approach to large
systems. This means that the proposed approach successfully provides a refined
framework for the treatment of entropy in each of classical statistical
physics, Dirac's formalism of Quantum Mechanics, large systems of quantum
statistical physics, and finally also for Quantum Field Theory.
