The Scientific RPN Calculator for WebOS is a highly sophisticated calculator application with a large array of numeric, trigonometric and statistical functions. As an added bonus this application contains a full blown unit converter with over 20 properties and tons of units to convert to and from. This makes separate converter apps unnecessary! This calculator behaves very much like the famous HP1xC range from Hewlett-Packard so users of these calculators will feel right at home with it. Users who are new to RPN calculators will be able to quickly learn how to use it thanks to the comprehensive built-in manual. IMPORTANT: An RPN calculator DIFFERS from regular arithmetic calculators. There is no equals key (=), there are no brackets and data is entered in a different way. For example to calculate 3+4 you would enter: 3 ENTER 4 + Please make sure you understand what an RPN calculator is and how it differs from a regular calculator before purchasing this app! Feature highlights: - Full blown unit converter with over 20 properties and tons of units to convert to and from - 5 level stack with UNDO, stack roll and many other operations - 10 continuous memory registers - WebOS drag & drop stack manipulation - Comprehensive set of numeric functions and trigonometric functions including hyperbolic functions, coordinate conversions and numeric conversions - Configurable scientific and engineering display modes with user defined precision - Advanced statistics functions exactly mimicking the HP calculators such as linear regression, y-intercept and r, permutations, combinations and standard deviation properties with many different units. - Keyboard support, audible feedback and real-time stack display - Gorgeous design - Comprehensive built-in manual