Abstract: A method of storing and/or retrieving location-based information comprises: storing, in a distributed network of data storage devices accessible simultaneously from a plurality of remote user terminals, data defining a plurality of first localities in relation to which information storage is accessible, and selecting ones of the first localities to represent second localities for which information is to be stored and/or retrieved such that i) the first and second localities bear a predetermined locational relationship, and ii) the first and second localities bear a predetermined relationship in size.

Abstract: A method of selecting information sources from which information is provided to users via a telecommunications system, the method comprising: tracking the location of a user in the system by receipt of tracking information for the user; accessing location data indicating localities in which information from the respective sources is deemed to be relevant; generating a shortlist of information sources for the user on the basis of the tracking information and the location data; and transmitting the shortlist to a terminal associated with the user so as to allow the user to select an information source of interest and thereby to access information from the source.