The document discusses various topics related to applications of the internet. It begins by introducing e-commerce and how it has revolutionized business operations. It then discusses how to safely use e-commerce by researching sellers, using secure payment methods, and tracking orders. Next, it introduces web portals as centralized hubs for accessing information and services, and provides tips for securely using portals. It also discusses how travel and tourism websites can help plan trips and highlights steps to safely use these sites. Finally, it introduces different social networks and how they enable online connections, before concluding with the role of digital literacy in the entertainment sector.