Editorial computing A = Simple arithmetics V = Variables and expressions (also elements of matrices and data sets) B = Numerical accuracy and form of results M = Mathematical functions E = Functions defined in the edit field I = 'if' statement F = 'for' statement J = 'integral' statement for numerical integration R = Roots of equations S = Multiple activations L = Library functions T = Computing on tables C = Numerical conversions P = Multiple precision computations X = More information on mathematical operations