21. The computer program product of claim 20 , wherein the program code configured for coordinating the display of the presentation data includes a function selected from the group consisting of: using a first type of marking for visually identifying a data item in the display that is yet to be discussed; using a second type of marking for visually identifying a data item in the display currently being discussed; and using a third type of marking for visually identifying a data item in the display that was previously discussed.
20. The computer program product of claim 15 , wherein the program code configured for coordinating the display of the presentation data automatically selects which relevant portions to display from the plurality of matches.