11. The computer program product of claim 10 , wherein the instructions for creating a postal code table comprise instructions for generating a sorter number for each of the plurality of postal code ranges.
12. The computer program product of claim 11 , wherein the instructions for constructing the index table comprise instructions for: extracting a postal code from each document in the unsorted document print stream; in response to the extracted postal code, obtaining the corresponding sorter number and scheme number from the postal code table; and storing in the index table the location of each document and the corresponding sorter number and scheme number for each document.