IMMEDIATE EFFECT: Minimal time between question and answer. WORLDWIDE SCALE: Covers the entire universe. REAL TIME: Data is captured at the same time facts are happening and this information is immediately available to users. ACCESSIBILITY: From any place and at any moment. GREAT STORING POWER: Almost endless. Very cheap. CUSTOMIZED: User oriented. Very simple. INTERACTIVITY: User and systems communicate each other in a dialogue mode. MULTIMEDIA: Any information media is available. Text, sound, video or films are equally accepted.