United Kingdom chemists will already be familiar with the web sites of the Royal Society of Chemistry and Chemistry and Industry magazine. Now the American Chemical Society has gone online at http://www. ChemCenter.org. Meanwhile Current Science, pleased with the progress of its members-only BioMedNet site, has teamed with chemical database owners MDL to extend the "club" concept to chemistry at a cost of $6 million. See http://ChemWeb.com.