During 18-23 July 1993, Sydney Convention and Exhibition Centre, located in the magnificent landscape of Darling Harbour in Sydney, Australia, hosted the 12-th World Congress of the International Federation of Automatic Control (IFAC). This was the first IFAC Congress to be held in the Southern Hemisphere. The IFAC World Congress is the most prestigious scientific event of the world in the automatic control domain. It takes place triennially. The 12-th IFAC World Congress in Sydney, 1993, had a profoundly innovative and ample technical program, including mini-symposia, target areas, plenary sessions, invited sessions and contributed sessions. The latest significant achievements in control theory and its applications (including management, education, social impact of automatic control, etc.) have been presented at this congress.