On-line travel agents. By typing in information about your travel plans, you can check flight schedules, purchase airline tickets, book hotel rooms and reserve rental cars. The White House Briefing Room, located within the overall White House site, draws together data from a variety of government departments. The site covers economic data and social satistics, such as, population growth, crime, education, and more. This site can track down the yellow-pages sites in 100 countries.
Experts tackle elementary to college-level questions in math, physics, technology, and other fields.