This application has been designed and engineered for easy operation at any level. The Natural Display and enhanced features makes it versatile and the perfect choice for high school and college students alike. THIS VERSION HAS THE SAME FEATURES BUT NO ADVERTISING. Multi-skin. Copy clipboard. Percentages. Memories. Trig functions in degrees, radians or grads. Fixed-point display modes. Configurable digit grouping and decimal point. Degrees, minutes and seconds. Adjustable size digit.