Top positive review
on 16 January 2014
I've just looked back to my previous purchases and realised that I never reviewed this. It deserves a review as I really haven't been able to fault it in the plus three years I have been using it. I was first introduced to RPN when I bought the HP25C in 1976 and have been hooked on it ever since. After the HP25C battery gave out some while ago I had to make do with a 19B (business not scientific) and for years amid rumours of HP never making another calculator I have been dreading the thought of that not working.
By chance I discovered the HP35S. It has a similar great design, clear and easy to read lables, is robust, just the right size to be comfortably hand held and is comprehensive for all common scientific functions. On top of that its price was about a quarter of that I paid for the HP25C in 1976 (despite inflation and the change in currency value)
All the functions I could wish to use are there and are easily accessible - conversions, statistics and probability, evaluating and solving equations, and a programming capability, as well as other functions I use less. I do agree with another reviewer who comments on the lack of a printed user guide, although there is a 'quick start' guide. I did print off the whole user guide, which took up most of a lever arch file, but I found it was well worth doing, and on occasion has saved me time by pointing out easier and quicker ways to do calculations I have been struggling with. I've found the battery life has been fine. Like others, I should point out that although I use it in Reverse Polish Notation mode it can also be used in Algebraic mode. Purely on a personal basis 'long live RPN' and may HP continue to provide the facility to use it on their calculators.