Different types of organizations and individuals are responsible for web sites. All web addresses contain three letter extensions (domain) that indicate what type of organization or individual is responsible for the web site. Many search engines let you limit your search by domain name. .com--commercial organization .edu--educational institution .gov--government .org--typically used for non-profit organizations Looking at these address extenstions will not only help you limit your search but it will also help you decide on the appropriateness of a given site. For instance, if you are looking for statistical information you might want to limit your search to .gov sites as the government collects a great deal of data about a variety of issues. Do not assume that just because an organization claims to be non-profit and has a .org domain that you should trust it. Organizations and individuals create web sites to support a cause. When using .org web sites make sure the responsible organization tells you something about themselves. Avoid mysterious .org web sites as you do not know where they come from. Lastly, it is important to realize that much of the information on the web is of a commercial nature. Individuals or organizations are trying to sell you something. They are not necessarily trying to inform you.