Keyword and citation based searches of the literature 1981-present with abstracts is possible using BIDS ISI Data Service over the WWW.	Usernames and passwords are available from Janet Milne	BIDS Help
The CDS Service hosted by Daresbury Laboratory includes ISIS Base, which is useful for locating commercially available compounds and organic reactions, and the Cambridge Structural Database which contains X-ray data which can be searched graphically on-line using Quest.	Register on-line here	CDS Help
Beilstein/Gmelin is a compound/reaction database using Crossfire hosted by MIDAS which is invaluable for synthetic organic and inorganic chemists alike.	Register on-line here	Crossfire Help