Old technology but nothing else is better. It isn't compatible with new computers but am ...
Otulea T., Amazon
22 September 2015
Summary: Old technology but nothing else is better. It isn't compatible with new computers but am using it as a straight calculator without the add-on applications. Still the best engineering calculator out there.
Does everything, but poor documentation is an obstacle.
Mark Huth, Amazon
9 August 2015
Summary: I am having trouble deciding what rating to give this beast. As a calculator, it is magnificent. I started with the HP-35 40+ years ago, and find for engineering problems RPN is really the best system to use.