Henry, Scirus uses robots and, like all automatic engines, cannot be expected to use any judgement about what is genuinely science. If you are going to handle vast quantities of information, you cannot do it manually. A literature review has appeared and I imagine that Elsevier will be learning from it, to the benefit of later releases. As regards the "Rzepa" searches, I gather that Steve Bachrach also had some trouble finding some of his own articles. ChemIndustry is becoming very popular (probably as a result of referrals from CAS, amongst other things) and is less likely to index something that is not chemistry, since human intervention is involved. However, the human can intervene in all sorts of ways, and, as you yourself pointed out some time ago, a high ranking in the hit list is not necessarily allocated for altruistic reasons. ChemGuide.de is much less used (according to Netscape and Steve Heller). It too uses experts to sift out the dross. As far as I know, you can't buy a place in its honours list. I tried it out a long time ago and got some useful hits. However, some would say that its interface is not ideal. It's perhaps time someone did a proper precision and recall type study on chemistry search engines, but easy-to-use tools for end-users tend to have different requirements from those imposed by information professionals. Are you going to the Chicago ACS meeting? The session on portals is likely to address this subject. Wendy Dr. Wendy A. Warr Wendy Warr & Associates, 6 Berwick Court Holmes Chapel, Cheshire, CW4 7HZ, England Tel/fax +44 (0) 1477 533837 wendy@warr.com http://www.warr.com chemweb: A list for Chemical Applications of the Internet. To post to list: mailto:chemweb@ic.ac.uk Archived as: http://www.lists.ic.ac.uk/hypermail/chemweb/ To (un)subscribe, mailto:majordomo@ic.ac.uk the following message; (un)subscribe chemweb List coordinator, Henry Rzepa (mailto:rzepa@ic.ac.uk)