Casio FX-115ES Advanced Scientific Calculator with 2-Line Natural Textbook Display

I had an upcoming exam that specifically prohibited programmable calculators, so while I have quite the “stable” HP RPN machines, all of them were out. The FX-115ES was what I found as a substitute, and I’m quite impressed, especially for the price (which is $18 at Target, BTW). The machine works well and is quite feature-laden and easy to use — I believe it is the most powerful non-programmable, non-graphing machine out there, and at a price where you can afford a few spares to spread around your home, office, car, etc. so that you don’t have to worry about losing one.

I’ve had tons of calculators over time, with the Casio FX-4000P (back in the late ’80s) being the first truly memorable one (my brother had an FX-7000G, the first graphing calculator). I switched to HPs in college, and I am still an RPN die-hard (I’m eagerly awaiting the release of the 30th anniversary HP-35s this summer!), but I can still appreciate a quality product such as this from Casio. (more…)