Abstract: A web-hosted system includes a server and a block of memory addresses accessed via an URL application on a mobile device. Within the block of memory addresses there are several independently addressable and independently managed sub-blocks. Short codes inputted by a user on his or her mobile device address both the sub-block and data within the sub-block.

Abstract: A system assigns, to an advertisement while it is running, a short, easily remembered code from a limited list of available codes. A listener or viewer can use the code access the web address and/or telephone number broadcast by the advertisement. The code is assigned to the advertisement. That is, when the advertisement stops being, the code associated with that advertisement is returned to the database of available codes and can be reassigned. A preferred embodiment of the invention relates to radio broadcasting. Here, the data base includes the broadcast station or stations that air the advertisement so that in reassigning a code (preferably an alpha numeric code), it is assigned to an advertisement running in a broadcast area that does not overlap with the broadcast area where it had been previously recently used.