A web page address within a primary domain that points to a sub-directory within the primary domain. For example, aol.com is a domain. netfind.aol.com is a sub-domain, or subdirectory within the aol.com domain. The reason you can get to aol.com without typing http://www.aol.com (you can type simply http://aol.com) is the “www” is the default sub-domain of the primary domain of aol.com. Table One or more rows of cells on a page used to organize the layout of a page or arrange data systematically.