Object-oriented programming is well-recognised to facilitate the design of complex systems which manipulate numerous and diversified objects. This complexity increases when the system must support a multitude of functions determining applicative contexts or points of view on objects. It gives rise to the question of orthogonality between objects and functions. After a review of existing works, we present the CROME approach where programming is structured both into objects and functions. We present its associated programming techniques : contextualized description of objects and collaborations, modular inheritance, execution and articulation of contexts. We show the application of these principles in a typed world like Java using AspectJ.