Sites beyond the home page of an organisation or institution usually take the form:
The pathname refers to the directory or file where the information is to be found. In this instance the document name is acgt.htm, and it is stored within a directory called genetics on a machine belonging to an organisation called DOH (actually the Department of Health). The longer a web address is, the further away from the home page it is.
What information can you glean from this URL? The answer is on the next page.