Observability and Scientific Realism.- History.- The Origin of Scientific Realism: Boltzman, Planck, Einstein.- General Philosophy, Scientific Realism.- Observability and Referentiality.- A new Approach to Human Cognition and its Significance for the Philosophy of Science.- Abduction and Non-Observability — Some Examples from Language Science and the Cognitive Science.- ‘Scientific Realism’ and Scientific Practice.- Random Philosophy.- Formal Representation and the Subjective Side of Scientific Realism.- Convention and Observability — Poincaré once again.- Scientific Realism, Objectivity, and ‘Technological Realism’.- Philosophy of Observation.- Testability and Empiricism.- Observing the Unobservable.- What does it Mean to Observe Physical Reality?.- Realism, and the Case of Rival Theories without Observable Differences.- Measurability, Computability and the Existence of Theoretical Entities.- Observation, Construction and Speculation in Cosmology.- Where did the Notion that Forces are Unobservable come from?.- Philosophy of Quantum Theory.- Quantum Mechanics without the Observables.- Observation, Contextuality and Realism.- Leibniz, Kant and the Quantum — A Provocative Point of View about Observation, Space-Time, and the Mind-Body Issue.- Efficient and Final Causes as CPT Reciprocals.- Specific Issues of Observability in Quantum Theory.- Observability and Realism in Modern Experiments with Correlated Quantum Systems.- Quantum Mechanics, Realism and the Ultimate Observer.- Individualistic and Statistical Interpretation of Quantum Mechanics.- How to Observe Quarks.- Common Experience and Quantum Theory — Observables and Beables.- On the Relationships between Classical and Quantum Mechanics.