This emulator is supplied as is. Use it at your own risk! Always double-check important calculations by other means.
There are some key bindings that make the emulator easier to use in typical usage. Make sure the calculator is in focus (by clicking it) so it can receive the keystrokes.
In case you need help to use the advanced features of 15C, take a look on this quick reference guide. There are lots of good material in the Internet, including the full manuals.
If you prefer a simpler calculator (with the basic financial and arithmetic operations) or if you don't know the RPN notation, you can try this form-based calculator instead.
All rights reserved. It is forbidden to copy this calculator to other sites. Write me if you have any doubts.