"GNU Octave is a high-level language, primarily intended for numerical computations", according to its home page [http://www.octave.org]. Its language "is mostly compatible with [Matlab]." http://merlin.inescn.pt/~qual/tk_octave/index.htm ? Tkoctave octcl Paul Kienzle [http://users.powernet.co.uk/kienzle/octave/]