Domain

A domain is an organizational level within the internet. The internet uses an addressing scheme, that employs the domain naming system. This system provides a method of uniquely identifying different organizations, computer systems or individuals on the internet. The domain names always proceed from left to right, from most specific to most general. The top level domains are those that are rightmost in an address followed by dot com. The domain can be purchase which is called purchase domain and another form is free domain.

http://alltopprograms.com/domain