kayak.com is a website that allows its users to search for travel deals across many different Internet sites all in one. The interface for the website is simple with everything compacted on the home page, no scrolling necessary. The interface allows you to choose from flights, hotels, cars and more. The usual About Us, Privacy and other links are at the bottom of the home page along with links to flights for popular destinations. When you select your “to” and “from” for your travel, a new window pops up with fare prices found in the last 48 hours from other kayak users. When you search for a flight, the results are presented in ascending order on price; clicking on a flight will take you directly to the website the fare was found on for you to book the flight. You may also modify the search results to show fares in currencies other than the US dollar. There are quite a few advertisements on the site, which is the primary revenue model for the website as a whole. Additionally, the site offers email notifications, a history of fares to particular destinations and the ability to modify your options. The primary users of this site are people searching for deals on flights or vacations and do not want to research multiple sites. Finally, signing up for the site is an easy process with only an email address, home airport and password required to register.