Practical and simple manual setting out in a few the criteria necessary to classify or make the diagnosis of a system disease. This is an application intended for students of health sciences, medical and paramedical personnel. Characteristics: -Simple, practical and free application. -Content available completely offline. -The main diseases of the system: Connectivitis, rheumatism and vasculitis -Possibility of quick search in the application (name of the disease, abbreviation of the diseas