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Recommended Subject Directories, Gateways, Internet Directories, Specialty Directories, Hubs
 
(sites organized by subject; sites selected &annotated by a subject specialist or a librarian; search results are fewer than those found using a search engine but are often more reliable when sites to be included in the directory have been selected by a respected source)

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Information on Search Tools

SearchEngineWatch
http://www.searchenginewatch.com
Provides an insight into how search engines are performing in different areas, tips, newsletter, how to search, etc.

Search Engine Showdown
http://www.searchengineshowdown.com

ResearchBuzz
http://www.researchbuzz.com