You can prevent the indexing of a particular page in the following ways:
Applying the NOINDEX metatag:
Place one of the following metatags in the <HEAD> section of your page:
<META NAME="ROBOTS" CONTENT="NOINDEX">or
"META NAME="Slurp" CONTENT="NOINDEX""
Yahoo! Slurp retrieves the document, but it does not index the document text.
Applying the NOINDEX Directive:
Configure your web server to place the following directive in the HTTP header used to serve the page:
X-Robots-Tag:NOINDEX
Note: Although the document content is not indexed, the URL might remain in the search engine database as a reference link from other public web pages.