20 Years of QCD String Effects ============================== T.Sjostrand Lund University Abstract: -------- The string model and its applications are reviewed, especially experimental tests from the days of PETRA and onwards. Topics include the string effect, alpha-strong determinations, perturbative effects and parton showers, heavy-flavour asymmetries, and QCD interconnection. ----------------------------------------------------------------------- P.S. The developing program for the Tuesday seminar you can find at: http://www-h1.desy.de/~niebuhr/sem_schedule.html