Domain names were invented to identify the web site on the Internet. They are like your address book, providing a distinctive name for every contact. Let's look in more detail at a domain name, using this site's domain name as an example. This site's domain name is site2you.com - you can check this easily by looking at in the address bar of your browser. “.com” is the top domain under which this domain name is registered. There are many different top domains out there, from commercial (.com) through to non-profit (.org) and even country-specific top domains such as France (.fr) and Italy (.it). Don't be caught out: .com is pronounced "dot-com". Other international domains, such as .net or .org are pronounced "dot-net" and "dot-org" respectively. Country-specific domain names, on the other hand, tend to get spelled out. .jp is pronounced "dot-jay-pee" for instance. “Site2you” is the sub-domain of my domain name. This is the part of the domain name that we were able to choose - we made it up when we registered a domain name.