If it is a PDA/Calculator hybrid having a contact monitor, forget about it! I don't need to have to make a choice from greasy fingerprints or generally fumbling to get a stylus.Why can't anyone just create a good calculator that does what It really is alleged to, rather than some calculator / PDA / laptop computer / Borg monstrosity?The prevention

HP-28 and HP-forty eight These versions have RPL which is not described below. Thankfully, manuals for these newer design are still effortlessly acquired. The main variance is the fact pressing ENTER only places the variety in the lowest amount of the stack in lieu of X and Y as on RPN calculators. You may as well see the RPN versions website page