RPN Engineering Calculator

This software is a Programmable RPN calculator with 7 unique keypads and 15 discrete calculators for complex functions. It boasts a complete help system with individual tips for most functions, and even has a Tip of the Day feature for new users. Select from fixed, scientific or engineering notation and degrees, radians, or grads. Save and print your calculations, thanks to the running tape display.

The software includes 24 storage registers identifiable by name, and is programmable using the easy-to-learn RECPL language. Some of the key functions included in any keypad include REG for manipulating the storage registers, Lastx for recalling the last number used, and Drop for deleting the number in the x-reg and replacing it with the number in the y-reg.

The unique keypads are:
- Standard: includes functions found on a normal scientific calculator (log, ln, N!, etc.), in addition to a simple math teaching aid for kids, Wind Chill calculator, and more.
- Engineering: handles problems like Resonant Frequency, Ohms Law, Parallel Complex Impedances, Polynomial Equations, Impedance of a Ladder Network, and many more.
- Binary: is used to manipulate unsigned Binary integers of various lengths (word size) from 4 to 64 bits, with about 22 functions available.
- Magnetics: for the design of transformers and inductors, with many built-in functions unique to magnetic component design.
- Trig: solves Arc Length, Right Triangle, and any Defined Plane Triangle problems, also computes the trig functions, as well as some hyperbolic functions. Converts Radians to Degrees, and Hours, Minutes, Seconds to Decimal Hours and vice versa.
- Convert: offers thousands of conversions, more than 40 physical constants and many specific gravities.

Overall, this software is an all-around impressive tool for anyone in need of sophisticated calculations. With its numerous functions and helpful tips, it is great for anyone from new users to seasoned professionals.