Search functionality specific to one site.
Site search can make or break the user experience. Great search results can help win long-time visitors. Poor search results (“no records found” or “every record found”) risk losing visitors forever.
Search tools are often divided into two categories; software that runs on your servers and hosted services that run on remote servers. Small sites may benefit from a free site search engine service, although the low cost may come at the expense of 3rd-party advertisements with the search results. Enterprise sites may need to buy more customizable solutions, which often run several thousand dollars or more, depending on volume.
site search engine
information and advice about site search technology
More Fundamentals for a Quality Search
ClickZ (January 25, 2001)
The Fundamentals of Quality Search
ClickZ (January 18, 2001)
Search and You May Find
useit.com – Alertbox (July 15, 1997)
What is a Web Site Search Tool And Why Would I Want One?