The algorithm, the structure and area of application of package "Automatica" are considered. The package is intended for engineers-developers of real-world control system. The purpose of such users is to provide the given tolerance on steady-state error for each controlled variables when the disturbance is unknown but bounded function and the uncertain plant parameters change their values slowly. In this connection, the identication of plant parameters and redesign of controller are required. The package has special structure that is oriented for such users. The basis of this structure is the directives that solve dened class of problems. The package includes three groups of directives: controller design, nite-frequency identication, frequency adaptive control.