内容简介：
【简介】 ChemGuide and MedPharmGuide are search engines for chemistry or medicine and pharmacology information in the Internet. They cover only individually selected topic-related servers for the efficient retrieval of relevant information with fewer off-topic hits.
PublishersGuide is a search engine covering the web servers of publishers, institutions, societies etc. that publish in the areas of science and technology.
ChemGuide currently covers 5842259 web pages. MedPharmGuide currently covers 5507749 web pages. PublishersGuide currently covers 3070572 web pages. The search engines offer extremely powerful functions: Use Boolean and proximity operators and versatile truncation options unrivalled by any other Internet search engine.
