Patent ID: 6871782

Claim:
A customisable user interface system comprising: a card comprising a substrate, a memory device associated therewith, and indicia formed on said substrate and user interpretable to relate to functions stored within said memory; wherein mapping data is stored within said memory device, said mapping data defining, in relation to each indicium, a bounding box delineating a mapped position of said indicium on the substrate; and a reader device for said card comprising a touch sensitive device arranged to overlay an inserted said card and through which said indicia are visible, characterised in that (a) said touch sensitive device comprises a membrane via which said indicia may be selected, the membrane being responsive to a touch applied anywhere on the membrane, said membrane providing, in response to said touch, touch coordinates corresponding to a location of the touch on the membrane, and (b) the indicia are arranged on the card independently of where the touch can be applied to the membrane, wherein generation of touch coordinates falling within said bounding box establishes selection of said indicium.