This diagram illustrates the functional interactions within an E-learning system, mapping out various user roles like System Admin, Academician, Registrar, Department Head, Instructor, and Student against the system's functionalities like Login, Logout, Manage Users, View Reports, etc. It serves as a blueprint for understanding how different users interact with the E-learning system, outlining key processes such as course registration, result viewing, and content management, highlighting the system's versatility and user-centric design.