Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Observer-Centered Formalism (OCF) is an approach to Physics that puts the observation in the center of the formulation of the laws of physics; OCF is concerned of only "what The Observer can see" and describes the world "as it''s seen by the observer". In stronger terms OCF postulates that it makes no sense describing the physical reality that is not the subject of the observation, t.e. what is not being observed doesn''t exist. OCF is an extension of Copenhagen Interpretation of Quantum Mechanics and it paints a less deterministic picture of the universe.