  We discuss the QDN (quantized detector network) approach to the formulation
and interpretation of quantum mechanics. This approach gives us a system-free
approach to quantum physics. By this, we mean having a proper emphasis on those
aspects of physics which are observable and an avoidance of metaphysical
concepts, which by definition are incapable of verification and should play no
role in science on that account. By focusing on only what experimentalists deal
with, i.e., quantum information, we avoid the ambiguities and confusion
generated by the undue objectification of what are complex quantum processes.
