Scilab is a scientific software package for numerical computations in a user-friendly environment. It features: Elaborate data structures (polynomial, rational and string matrices, lists, multivariable linear systems,...). Sophisticated interpreter and programming language with Matlab-like syntax. Hundreds of built-in math functions (new primitives can easily be added). Stunning graphics (2d, 3d, animation). Open structure (easy interfacing with Fortran and C via online dynamic link). Many built-in libraries: Linear Algebra (including sparse matrices, Kronecker form, ordered Schur,...). Control (Classical, LQG, H-infinity,...). Package for LMI (Linear Matrix Inequalities) optimization. Signal processing. Simulation (various ode's, dassl,...). Optimization (differentiable and non-differentiable, LQ solver). Metanet (network analysis and optimization). Symbolic capabilities through Maple interface. Note: To configure your local printers, add their names to the PRINTERS variable in the scilab script. For more information see Scilab Home Page http://www-rocq.inria.fr/scilab/. -- P. Menezes (paulo@isr.uc.pt)