Helen Hough, M.L.S.

University of Texas at Arlington

• Web search engines are used to find WWW material

• Since the Web has lots of anything, most search engines only cover a small portion

• Logic of Web Search Engines is based on successful database search engines

• Search Engines
  Finds pages with specified terms

• Web directories
  list pages by topic

• Meta Search Engines
  execute various other engines and provide compiled results

http://www.uta.edu/library/internet/search.html

• Search Engines: looks for material fitting its criteria
  read the about screens; often able to do phrase or Boolean searches

• Web Directories: need flexibility
  their categories may not fit your logic

• Meta Engines: covers lots at once
  refined searching not enabled

• There’s lots of junk on the Web

• No logic on the Web

• No vocabulary control on the Web

• There are "not nice" pages on the Web

• If someone earns a living producing something, it is not likely to be freely available on the Web

• "term1 term2" or (term1 term2) finds phrases

• +term1 +term2: Boolean AND

What is?

Yahoo (www.yahoo.com)

Dogpile (www.dogpile.com)

Metacrawler

Northernlight

Google

More search engines & directories -
Internet Resources: Search the Web (http://www.uta.edu/library/internet/search.html)

Look for: