Collaborative Systems OrthogonalityDaniel MILODINAcademy of Economic Studies Bucharest Romania daniel.milodin@ase.ro Sorin-Nicolae DUMITRU Academy of Economic Studies Bucharest Romania sorin.dumitru@yahoo.com This paper describe the concepts of collaborative systems. It is presented the concept of orthogonality applied to collaborative systems. There are presented the criteria used to classify the collaborative systems. Keywords:collaborative systems, orthogonality |