Web Search: allows one to ask for content meeting specific criteria (typically those containing a given word or phrase ) and retrieves a list of references that match those criteria. Search engines use regularly updated indexes to operate quickly and efficiently.

Topical Directory: A directory on the World Wide Web that specializes in linking to other web sites and categorizing those links. Web directories often allow site owners to submit their site for inclusion.

Phone Directories: are a listing of telephone subscribers in a geographical area or subscribers to services provided by the organisation that publishes the directory.

Map Search: a web application which provides portrayal of geographic data. Useful in finding travel routes and locations of businesses in a location.