Abstract VIth International Conference on Immunofluorescence and Related Staining Techniques. Vienna, April 6–8, 1978. The program will include symposia, workshops, poster sessions and a scientific exhibition with special emphasis on practical demonstrations. The number of participants is limited to 300. Provisional list of symposia New developments in immunofluorescence methodology New developments in immunoenzymatic methods Practical applications of fluorometry and pattern recognition Immunofluorescence flow cytophotometry and cell-sorting techniques Applications of immunofluorescence to public health and environmental sciences Provisional list of workshops Clinical applications of immunofluorescence flow cytophotometry and cell-sorting techniques Immunodermatology Immunohematology and tumor immunology Transplantation Parasitology and microbiology Field trials Autoimmunity For further information, please contact Dr. W. Knapp, c/o Wiener Medizinische Akademie, Alser Strasse 4, A-1090 Wien, Austria. VI International Conference on Lymphatic Tissues and Germinal Centers in Immune Reactions. Damp/Kiel, Federal Republic, West Germany, June 11–16, 1978. The conference will meet in the Congress Center in Damp, a small resort on the Baltic Sea about 25 miles north of Kiel.