The American Statistical Association
International Society for Bayesian Analysis
The International Biometric Society
Statistical Society of Canada
The International Chinese Statistical Association
The Indian Statistical Institute
Statistics Finland
Royal Statistical Society
American Mathematical Society
American Association for the Advancement of Science
Association for Women in Science
Society for Industrial and Applied Mathematics
The Society for Clinical Trials
American Society for Quality
Institute for Operations Research and the Management Sciences
Decision Sciences Institute
S-PLUS
SAS Institute
SPSS Inc.
Minitab Incorporated
StatSoft
Comprehensive R Archive Network
U.S. Census Bureau
U.S. Bureau of Labor Statistics
Centers for Disease Control and Prevention
See The American Statistical Association website for additional organizations without websites.