The Fifth International Conference on Reliable Software Technologies, Ada- Europe 2000, took place in Potsdam, Germany, June 26-30, 2000. It was - ganized by Ada Deutschland and sponsored by Ada-Europe, the European f- eration of national Ada societies, in cooperation with ACM SIGAda and the Gesellschaft fu ]r Informatik (GI). We gratefully acknowledge additional spons- ship by the DFG, the German Research Foundation, and by the Forschungsz- trum Karlsruhe. This year's conference marked the 20th anniversary of consecutive annual Ada-Europe conferences and the ?fth year of a conference...