The objective of this paper is to present the Virtual University of Cluj-Napoca (http://wouc.utcluj.ro), educational component of the Technical University of Cluj-Napoca, as an environment which allows multiple educational technologies to be implemented. We aim at a flexible educational framework to allow active learning, co-operation and knowledge building. The Virtual University is designed as a three tier system implemented din Java technology for platform independence. The client tire uses Java Script to enhance client side presentations. The middle tier implements the Web server and the application logic. Client tire - middle tire interaction uses applets, forms and servlets. Back end tire represents the application data in the form of DBMS. Middle tier - Back end tire interaction uses SQL, JDBC and JDBC/ODBC bridge. All functionality of the Virtual University Web server is achieved by means of servlet technology.