From the HSS website:
"Who We Are
The History of Science Society is the world’s largest society dedicated to understanding science, technology, medicine, and their interactions with society in historical context. Over 3,000 individual and institutional members across the world support the Society’s mission to foster interest in the history of science and its social and cultural relations.
Carrying Knowledge to the World
Several Society-sponsored initiatives carry advanced knowledge about the history of science to the wider world. The Society’s flagship publication, Isis, is the widest circulation journal in the history of science. Another journal, Osiris, produces annual thematic volumes devoted to a single topic of wide interest to the history of science community. The Society holds an annual meeting, at which several hundred scholars present and discuss cutting-edge research on the cultural relationships and historical development of scientific practices, theories, and technologies.
Towards the Future
As our members study the social effects of science and technology, the Society is also making use of new technologies to stimulate interest in the history of science. The Guide to the History of Science is an extensive directory of graduate programs, organizations, journals, museums, and individuals studying the history of science worldwide. We use relational databases to integrate job and grant listings, conference announcements, and news items into the Guide. The activities of the Society’s bibliographer are also key to the History of Science, Technology, and Medicine database online. Free access to this valuable research tool is available as a benefit to our members."