Patent ID: 6987506

Claim:
A method of enabling a user to navigate a directory using a list of directory entries printed onto a surface, the list of directory entries corresponding to at least one node of an index of the directory, the method including the steps of, in a computer system: causing a printer to print the surface by printing, substantially simultaneously: the list of directory entries, each entry extending over a spatial zone; and, coded data indicative of an identity of the list of directory entries and of a plurality of reference points, at least some of the coded data being provided in each spatial zone such that at least some of the coded data is substantially coincident with the list of directory entries; receiving indicating data from a hand-held sensing device, the indicating data being indicative of both an identity of the list of directory entries and a position of the sensing device relative to the list of directory entries, the sensing device being adapted to: (a) sense at least some of the coded data when the user touches the sensing device against the surface in the vicinity of a selected printed directory entry; and (b) generate the indicating data using at least some of the sensed coded data; identifying, using the indicating data, further directory information relating to a selected node of the index of the directory corresponding to the selected printed directory entry; and providing the further directory information to the user.