I, E and O as a Health Triangle In every living system the trio I, E, O constitute the three essential sides of a triangle (Fig 3) (17–19). This triangle corresponds to the survival phenomenon, where each side constitutes a different aspect of survival. Together they represent a measure of the survival potential, which by definition is the H of the system. The survival potential or amount of H in any living system can be defined as the mathematical product of its amount of E, I and O. Thus, survival potential = H = E × I × O. It is possible to increase the survival potential H of a living system by increasing any of its three essential elements. Similarly, H can be reduced by a cutback in any of its fundamental components. The E, I, O triangle is not equilateral, because the system's intelligence acts as a generating entity. It is not necessarily a two-dimensional triangle either. It may be spherical, elliptical or hyperbolic. However, the determination of this was not essential to develop the systemic technology. Finally, I is the most important side of the triangle, since it concurrently generates both energy and organization (20).