PITTSBURGH SUPERCOMPUTING CENTERA workshop entitled "Macromolecular Structure Refinement Workshop for Biomedical Researchers" will take place in Pittsburgh, Oct. 31 and Nov. 1. Deadline for submission of applications is Aug. 1.Contact Cherolyn Brooks, User Services, Pittsburgh Supercomputing Ctr., 4400 5th Ave., Pittsburgh, PA 15213; or call (800) 221–1641 (natl); (800) 222–9310 (Pa.); or (412) 268–5206 (Pa.).CONGRESS OF GENETICSThe congress will take place in Toronto, August 20–27.Contact Laurier Forget, National Research Council of Canada, Montreal Rd., Bldg. M58, Ottawa, ON K1A OR6 Canada; or call (613) 993–9009.MEDICAL SEMINARS INTERNATIONALThe following conferences will be held: "Body . . .