It's everything you need from a calculator; It's simply better! Standard Calculator includes 1) Standard functions 2) Basic Memory store, recall, add and subtract 3) Square root 4) Percentages 5) Grand Total 6) Results List shows all past results Office Calculator 1) Everything on the Standard Calculator 2) Tax rate addition and subtraction 3) Cost/Sell/Margin functions 4) Currency rounding mode Scientific Calculator Include dozens of common and advanced functions found on calculators and designed to work with multiple data array inputs including: 1) Common arithemtic power functions and logarithms 2) Trigonometric, inverse and hyperbolic 3) Degrees / Radians / Gradians 4) Engineering decimal shift 5) Unlimited Bracket nesting 6) Direct and easy data array input with all operations working on arrays 7) Multiple memory storage for single values and arrays 8) Rounding up/down/nearest/abs/fractional 9) Degrees/Minutes/Seconds data entry 10) Statistical Functions 11) Cumulative Distribution Function (CDF) 12) Array sum, sum of squares, products, dot products, sigma etc 13) Array sorts, histograms, union, intersection etc 14) Factorisation 15) Integrals, differentials of arrays 16) Triangle solvers for missing sides, angles, area etc 17) Solvers for line intersection, distance from line, rotation, quadratics 18) Polar-Rectangle coordinate conversion 19) Data array and results list views 20) Paste data arrays to-and-from other apps 21) Decimal Places and Significant Digits 22) Prior Results and Equation display ...and much more! Programmer's Mode includes 1) 8,16,32,64 bit signed/unsigned values 2) Easy binary, octal, decimal and hexadecimal input 3) Bitwise operations AND,OR,XOR,NOT,INV,NAND,NOR,XNOR 4) Shift and roll operations 5) Gray code, Bit and Byte reversals 6) Ascii display