A summary is given of papers published in the GDR in the field of drying including drying theory, dryer models, sensor development, and analysis of industrial dryers. Today in the GDR more than 10 000 dryers using 280 000 TJ/a are operated. So drying research and development mainly is driven by practical considerations, but there are pure theoretical approaches to dryer modelling and development of sophisticated drying sensors of general intereet too.