Joint International Symposium "Data Communications Technology and Practice",Sydney,Aug.24-26,1976 Joint International Symposium on Data Communications Technology and Practice,Sydney,1976 International Symposium on Operating Systems Theory and Practice,2d,Rocquencourt,1978 International Symposium on Space Technology and Science,10th,Tokyo,1973 International Symposium on Space Technology and Science,11th,Tokyo,1975 International Symposium on Space Technology and Science,12th,Tokyo,1977 International Symposium on Jet Cutting Technology,3d,Chicago,1976