A calculator with minimal screen footprint and text input. See what you typed, edit it, log calculations as text file. Algebraic expressions, trigonometry, definite integrals, prime numbers. User defined functions and constants. Also Bar charts, Scatter charts, Regression (Linear, Polynomial, Multivariate, Absolute Deviation); Standard Deviation; Plot functions; Solve Triangles; Simultaneous Linear Equations; Polynomial Roots; Navigation; Dates.