Various processes effectively execute updating of related information that is correlated to user selected information. For example, when a selected screen is touched by a pen or the like while an image corresponding to the selected image data is displayed on the screen, existing line drawing data (for example, a first character string) that is correlated to the image data and stored is displayed on the screen. In this instance, if new line drawing data (for example, a second character string) is input using the pen or the like, the new line drawing data is added to the existing line drawing data, and is correlated to the image data being displayed and stored. Different sound data can be correlated to selected image data. Different memo data also can be correlated user selected sound data.