This volume contains revised versions of papers selected with respect to the topic "Classification and Information Processing at the Turn of the Millennium." Researchers and practitioners - interested in data analysis, classification, and information processing in the broad sense, including computer science, multimedia, WWW, knowledge discovery, and data mining as well as special application areas such as (in alphabetical order) biology, finance, genome analysis, marketing, medicine, public health, and text analysis - will find latest results received at the turn of the millennium and presented during GfKl's 1999 annual conference.