So far, we have considered interval LP problems, in which each coefficient can vary in its interval domain independently of each other. This is often too restrictive in practice, so we address generalized models in this chapter. First, we deal with linear dependencies between interval coefficients. Second, we consider more general uncertainty sets, such as polytopes or ellipsoids. Also for the resulting enclosures we discuss other objects than simple interval and interval vectors, e.g., zonotopes or other polytopes.