1. Yahoo!Personalized content and search options. Chatrooms, free e-mail, clubs, and pager.yahoo.com - Site Info 2. Microsoft Network (MSN)Dialup access and content provider.www.msn.com - Site Info 3. GoogleEnables users to search the Web, Usenet, and images. Features include PageRank, caching and translation of results, and an option to find similar pages. The company's focus is developing search technology.google.com - Site Info 4. YouTubeYouTube is a way to get your videos to the people who matter to you. Upload, tag and share your videos worldwide!youtube.com - Site