1)   Matrix Calculator 1.1 Matrix calculator operations include: transpose, invert, scale, compute determinant and trace, adjoint, multiply, add, and subtract. Matrices can be saved to a text file for future sessions. A delimiter can be specified to separate elements. 2)   Inverse Matrices 1.03 Mathematical program for university students and professors. 3)   Kalkulator 2.41 Advanced Sci/Eng calculator. Expression evaluation, 18 digits precision, variables, >100 functions, graphs, unit conversion, interpolation, polynomial regression, linear algebra, systems of linear, nonlinear and differential equations, optimization. 4)   Linear Algebra 2 Performs computations associated with matrices: Solves systems of linear equations, finds sum, difference, product, determinant, trace, inverse, adjoint, transpose, eigenvalues, eigenvectors, LU factors, QR factors, tests for definiteness, etc. 5)   Linear Systems 1.02 Mathematical program for university students.