Kalkulator - Version 2.30 This is perhaps the most powerful scientific and engineering calculator for Windows. It starts from a "normal" calculator functionality: evaluating arithmetic expressions, which can be entered, evaluated, then corrected, modified and recomputed at will, with 18 digits of precision. Results can be stored in variables and re-used in other calculations. More than 100 functions have been provided, including the hard-to-find inverse integral statistical distributions; there are user-defined functions as well.The results can be presented in various formatst, fixed- and floating-point, deg/min/sec, etc., or converted between various units of measurement. Some physical constants are predefined as well. But this is just the beginning. Expressions can be submitted to graphing, numerical integration and differentiation, or to a zero search. Maximum/minimum search for functions of up to nine arguments is also possible.Kalkulator also finds real and complex roots of polynomial equations, up to quartic, and solves systems of linear, non-linear, and differential equations (ODE).There is a statistical data buffer with computation of distribution parameters.The data can be presented as histograms or scatter plots and fitted with an arbitrary function of up to 9 arguments.A separate window serves as a computer math calculator, performing operations in decimal, hex, octal, or binary notation, in 8, 16, or 32-bit word length.The program has been evolving on various OS platforms for the last 15 years, being refined and polished through all this time. This shows: the more advanced features do not overwhelm the more casual user. An extensive Help file is included, so is a text file with step-by-step examples.