This type of address is called the Domain Name System . As you can see, each address is made up of groups of letters or numbers separated by periods. These categories of information are called Domains, from which the Internet address system takes its name. The 'org' at the end of the Villanova address is what is known of as a 'top level' domain. It stands for non-profit organization.
Addresses can change over time.
You can use the URL to jump directly to any document on the web. This is particularly helpful if you have read about or been given an Internet address to a place that you have never been before. The http designation usually means that you are accessing a hypertext document. You should now go directly to that page. You can also go directly to a location by typing the URL in the location box or by clicking on the open location icon on the toolbar.