Package "Automatica" is intended for analysis and development of control algorithms for plants, considering parametric and structural uncertainty and influence of unknown-but-bounded disturbance. The package is intended for scientists and developers of real-world control systems. The goal of an engineer is to guarantee given steady-state error tolerance for each of the controlled variables while the disturbance is unknown but bounded and the uncertain plant parameters change their values slowly. Consequently the periodic identification of the plant model and appropriate redesign of the controller are required. The structure of the package is specially oriented for such kind of problems. The basis of this structure consists of so called directives that solve some dened class of problem.