.The structure of the URL is very precise. For instance, if you wish to use your Web Browser to visit the Microsoft Web site you would have to use the URL: http://www.microsoft.com Thus if you wish to visit the Web site of the company that produced this training material you would use the URL: http://www.cheltenhamcourseware.com Due to the very large number of organizations who now have Web sites, you can also use a search engine, in which you can enter a word or phrase connected with what you wish to find and it will then display sites which match the information which you have entered. The results can be overwhelming however. A recent search using the search words "PC courseware" displayed a list of a million sites containing these words!