International Society of Biomechanics http://isbweb.org/ European Society of Biomechanics http://www.esbiomech.org ISB Technical Group on the 3-D Analysis of Human Movement. http://academic.scranton.edu/organization/3dahm/ Center for Human Modeling and Simulation - U. of Pennsylvania http://www.cis.upenn.edu/~hms/hms_article/hms_article.html National Institute for Occupational Safety and Health http://www.cdc.gov/niosh/ Canadian Centre for Occupational Health and Safety http://www.ccohs.ca European Agency for Safety and Health at Work http://osha.europa.eu/en Occupational Safety and Health Administration (OSHA) http://www.osha.gov Musculoskeletal problems in Agriculture http://www.agri-ergonomics.eu/