In past years there have been several conferences on Computer Archi- tecture and Operating Systems, which were jointly sponsored by the Fachausschuss 3/4 der Gesellschaft fUr Informatik, Rechnerorganisa- tion und Betriebssysteme, whose field of interest is covered by the title of the conferences, and by the Fachausschuss 6 (Technische In- formatik) der Nachrichtentechnischen Gesellschaft im Verband Deutsche Elektrotechniker. The level of attendance at these conferences showed that they satisfied a genuine need. The Fachausschuss 3/4 mentioned above decided in the autumn of 1974 to hold a...