Summary: Good calculator, NOT RPN, that's what I was looking for. I knew the price was too good to be true. I just assumed with an enter button and no equal button it was. I was not deceived by the seller. Just didn't do my research.
Summary: I wanted tactile keys (feel the click) on my calculator. Hp is the only company I know of that does this. It helps to let you know that you have pressed a key without looking at the screen. The price of this HP 9s was very low and the number of functions exceeds the needs of the normal user.
Summary: Reverse Polish Notation (RPN) calulators use an <enter> key and do not have an <=>. Look closely at the image for this product: This calculator has an <enter> key and does not have a <=> key, but it's not RPN. The owners manual is useless (written in Spanish).
Summary: because is cheaper tha the casio and texas instrument and work well for a bargain if you need for continuously think and buy someone like TI85 or casio is better for graphics and the display is incolor this one is a simple...
Summary: This calculator was for the 13 year old for school. Being the local `nerd' I got tagged with `picking out a good one' for her. Casio MS115: Scientific [no graphing]. This calculator is cursed by having its documentation not written by a native U.S. English user.