MAT operations: A = MAT SAVE (saving matrices in matrix files) B = MAT LOAD, LOADM (loading matrix files to edit field) C = Standard matrix algebra (+,-,*,',INV etc.) D = Normalizations and derived matrices E = Element by element transformations F = Scalars in MAT operations G = Matrix decompositions H = Submatrices I = Control and auxiliary operations J = Row and column labels K = Additional MAT #operations L = Linear equations and least squares solutions (MAT SOLVE) S = Saving matrix files to Survo data files M = More information on Matrix operations