Abstract: An indexation system includes virtual address means for providing a virtual address of a trading entity, physical location means operable to provide data relating to a physical location associated with that entity and means for searching one or the other of the virtual and physical addresses and means provide the other of the virtual and physical addresses. The preferred embodiment allows Internet web site addresses to be indexed so as to provide the easy location by a combination of some or all of geographical district, telephone area code, organization/individual name, trade or service category and for attachment of any amount of information relating to that address. Thus, the customer has the convenience of being able to view all the site addresses to which any interest is expressed by organization/individual name, trade category, location or telephone area code as well as a number of other criterion.