RPNcalc-15c 2.1

The RPNcalc-15 is a full featured high end scientific RPN calculator with support for complex numbers and matrix math.
Main features:
- Scientific number format.
- Engineering number format.
- Integer truncation and absolute value.
- Trigonometric and inverse trigonometric functions.
- Hyperbolic and inverse hyperbolic trigonometric functions.
- Trigonometric modes (degrees, radians, grads).
- Combinations and permutations.
- Polar and rectangular permutations.