YaRPNcalc RPN calculator

http://www.objecttechnology.com/yarpncalc/index.html

YaRPNcalc is an RPN calculator written in C# targeting the .NET Compact Framework. It's designed for the limited screen size of Pocket PCs. YaRPNcalc is freeware.

Why another RPN calculator?
Two reasons:

I wanted an RPN calculator for my Pocket PC with big buttons, big enough to use the calculator with the fingers instead of the stylus.
I wanted to learn about .NET Compact Framework development as well as getting more fluent in C#.

What features does it have?
BIG buttons
simple to use
RPN input method. Two line visible stack
basic arithmetic operations
different display modes (Auto, Fixed, Scientific, Engineering) with possibility to choose number of decimal places
different bases (Dec, Hex, Oct, Bin) with possibility to choose between 8, 16 and 32 bit 'word size'
Deg and Rad angle modes
the usual stack operations (drop, swap, clear) including undo
arithmetic functions
logic functions
statistics functions
combinatorics functions
conversion mode, including user conversions
constants library, including user constants
short and long display modes in constant library with possibility to show value
quick constant and quick conversion function
colour coding
stores last settings
optionally stores the stack
regional settings aware (decimal point symbol and thousands separator)