sites. Typically, a Web site has as an intended point of entry,
a "home page," which includes links to other pages on the same
Web site or to pages on other sites. Online discussion groups
and chat rooms relating to a variety of subjects are available
through many Web sites.


Users may find content on the Web using engines that search
for requested keywords. In response to a keyword request, a
search engine will display a list of Web sites that may contain
relevant content and provide links to those sites. Search
engines and directories often return a limited number of sites in
their search results (e.g., the Google search engine will return
only 2,000 sites in response to a search, even if it has found,
for example, 530,000 sites in its index that meet the search
criteria).
A user may also access content on the Web by typing a URL
(Uniform Resource Locator) into the address line of the browser.
A URL is an address that points to some resource located on a
Web server that is accessible over the Internet. This resource
may be a Web site, a Web page, an image, a sound or video file,
or other resource. A URL can be either a numeric Internet
Protocol or "IP" address, or an alphanumeric "domain name"
address. Every Web server connected to the Internet is assigned
an IP address. A typical IP address looks like "13.1.64.14."
Typing the URL "http://13.1.64.14/" into a browser will bring the
user to the Web server that corresponds to that address. For
convenience, most Web servers have alphanumeric domain name
addresses in addition to IP addresses. For example, typing in
"http://www.paed.uscourts.gov" will bring the user to the same