Spreadsheet I was willing to give this up if the Palm Pilot worked out. This is the only thing on my organizer that will calculate except for a simple calculator. The calculator does not have capability of such things as trig functions. The spreadsheet lets me do almost any kind of mathematical function. The monochrome display is fine for me.
Color displays drain the batteries faster.
My intentions are to use the Zaurus forever. I will always be able to buy it from ebay. To me, the Zaurus is a true organizer. I attended a Franklin-Covey seminar to learn more about the Franklin system. Franklin-Covey should have bought the rights to market the Zaurus.