Audio book for pen-based computer

摘要: A system for producing audio output from interaction with printed material and a pen based computer system. The includes page including substantially invisible position code human viewable image. further pen-based determining of the image in response to interactions there between, e.g., upon tip's proximity is operable produce human-audible corresponding contemporaneously interaction. may be produced independent include textual word and/or an plurality pages provided book form allowing recordings rendered connection images, thusly providing interactive experience user.