Automatic Control is the research area and theoretical base for mechanization and automation, employing methods and technologies for processing of information (data and signals) to automate plants, processes, and general dynamic systems. These include, for instance, manufacturing and batch processes, machines, robots, transport systems, power production and distribution systems, avionic systems, environmental systems. These very different classes of systems can be modelled, analyzed, simulated and controlled with theoretical instruments which are the same regardless of the nature of the particular system.