Medical World Search - This tool has the ability to query other search engines, also provides a discussion forum, medical spelling and drug acronym devices. All users must register and pay annual membership fee. Medic8.com - Directory and medical search engine for healthcare professionals. MedHunt - A tool from Health on the Net that searches the full text of 60,000 medical documents. Searches can be narrowed by location or type of source. Gateway - The National Library of Medicine Gateway allows users to search in multiple retrieval systems at the U.S. National Library of Medicine. Entrez - Simultaneously search multiple life sciences databases at the National Center for Biotechnology Information (NCBI). KMLE Medical Dictionary - Search several resources simultaneously for medical terminology, medical abbreviations, journals, and drug names. Med Help International Search - Consumer medical search engine comprising articles, patient support groups, glossary, questions and answers.