Intended to complement the Web browser, Watson constructs a facade over certain services, collecting them in a single Mac OS X application. Watson speeds up navigation, since HTML does not need to be rendered on-screen and no superfluous graphics are transmitted over the Internet. Tools integrate with other Mac OS X applications such as TextEdit, Preview, and the Web browser. Most noticeable in Watson is the Aqua interface that one cannot find on a Web page. A user of the Yahoo! tool, for instance, browses categories using a "columns" view rather than a series of separate Web pages.