Hi, I have been an avid HP user since 1975. I have several machines (HP21, HP41, HP71, HP11 & HP85) and I carry the HP11 for business. Its small size is perfect. I do not understand why HP does not make a smaller RPN calculator anymore, surely there is a market and my 11C is getting old. I have great difficulty using a non RPN machine for anything other than simple calculations. Does anyone have any experience with RPN programs available for PDA's (Palm Pilot or similar)? Any advise is appreciated. regards, Robert