Abstract: A client/server system is disclosed, which includes a requester computer system coupled to a distributed network and having stored thereon demographic information associated with the requester, the demographic information available unencrypted such that the demographic information is accessible by any server within the distributed network, the demographic information being retrievable from a lookup table based upon an IP address provided by the requester to the server; and a server computer system coupled to the distributed network and customizing a block of content description language based upon the demographic information and providing the customized block of content description language to the requester.

Abstract: A block of content description language is requested from a server over a distributed network. The server retrieves demographic information associated with the requester, customizes the block of content description language based upon the demographic information, and provides the block of content description language to the requester. Customization may include providing selected advertising, or may prevent the retrieval of certain content to the requester.