URL
A Uniform Resource Locator (URL) is the address system used on the web. Each URL is unique, identifying a particular file or point on the internet. It consists of a string that supplies the Internet address of a resource on the World Wide Web along with the protocol by which the resource is accessed. The most common URL type is "http" which gives the Internet address of a World Wide Web page. Some other URL types are "gopher" which gives the Internet address of a Gopher directory, and "ftp" which gives the address of an FTP resource.
"URL" is an abbreviation for "Uniform Resource Locator".
URLs are the pointers to information to be retrieved when a hypertext link is activated by the user. They tell the browser how the information is to be obtained and where it is located.
URLs enable a single WWW browser program to incorporate many of the functions that normally require several other software packages, including FTP, news, Email and gopher.
In order to be able to locate Web pages on other computers, each computer and each document on that computer has an address. Much like your area code and telephone number identifies your region, and then your location, the URL (Uniform Resource Locator) of a Web page identifies a computer and the document you are looking for. When you publish your Web document on the Internet, you will be assigned a URL. (Most likely, your Internet service provider will give you a URL.) You will use the URL when telling other people how to locate your Web document. If the authors of another Web document would like to include a jump to your Web page, they would identify your URL as a hypertext jump.