17. The system of claim 16 , wherein the predetermined column threshold number T is in the range of approximately two to four columns.
16. The system of claim 15 , wherein the memory stores, and the processor executes, instructions for: determining a number of text columns C on the document page, and gaps therebetween, to distinguish between a word processing document page and a spreadsheet document page; wherein the processor identifies the document page as a spreadsheet document page when the number of columns C is greater than a predetermined column threshold number, T, and as a word processing document page when the number of columns C is less than or equal to the predetermined column threshold number, T.