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AlltheWeb Currently disputing the largest search engine on the web with Google

Alta Vista Includes many features to improve the accuracy of your searching see their help file for details.

Excite

Google Straight forward to use and with high quality retrieval this is an excellent search tool.

Hotbot

Lycos Heavily advertised but not highly rated search tool.

MedHunt Health related search engine that includes the sites evaluated by the Health on the Net Foundation.

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Evaluated Subject Directories

BIOME A searchable UK guide to quality Internet resources in the health and life sciences. It includes OMNI.

CliniWeb

Health Finder Major US Patient information site

Health on the Net

Health A to Z US Focus

Medical Matrix

MedWeb Partially evaluated for quality

Netting the evidence EBM resources selected by the ScHARR Library

OMNI The UK's gateway to high quality biomedical Internet resources

Patient UK Patient information site maintained by two GPs that while not operating strict criteria is selective in its choice of links.

SOSIG: Mental Health The mental health section of a UK index of evaluated social sciences sites.

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Google Directory Combining the highly effective ranking ability of the Google search engine with the rapidly growing Open Directory this promises to be a first rate search tool

Yahoo The best established directory but suffering from the difficulty of maintaining the currency of its links.

Open Directory A directory built and maintained by volunteer web users. People take responsibility for maintaining and expanding a section of the directory. This approach has created a directory indexing over 1.5 million sites.

Arbor Excellent US based nutrition and diet directory.

Achoo Health related directory

MedWebPlus Well organised directory with a clinical focus

Communityweb Search for UK community health related groups, documents and websites.

MedicalStudent.com This site focuses on links of interest to medical students with a particularly good section covering medical textbooks by specialty. For inclusion these textbooks must provide at least some free content.

PharmWeb Specialises in information for pharmacists with a broad range of links to pharmacy related material.

Radiologist Radiology resources such as journals, multimedia presentations and other educational resources.

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Ask Jeeves Allows you to ask questions in the form of sentences and then offers answers it knows. Also sends your search to several search engines.

Vivisimo Very quick as it returns only page titles and has the advantage that it attempts to remove duplicates.

Dogpile

Metacrawler

Dejanews