The Yahoo! Search engine saves snapshots of most of the pages it discovers during the web crawling process. We link to the cached page so that you can view the snapshot in case the live page is unavailable at the time of your search. When you view a cached page, youll see it as it looked when Yahoo! Search last indexed it, with search terms highlighted.
If you dont want your content to be accessible through the cache link, you can change your webpage to use either of the following methods:
原帖地址: TechSpott - Computer and technology forums http://www.techspott.com//showthread.php?p=952 Apply the NOARCHIVE metatag
Place the following tag in the
<HEAD> section of your page:
<META NAME="ROBOTS" CONTENT="NOARCHIVE">
or Apply the NOARCHIVE Directive
Configure your web server to place the following directive in the HTTP header:
X-Robots-Tag: NOARCHIVE
yahoo web crawler continues to index and follow links from the page, but it doesn't display a cached page link in search results. Please note this change will occur the next time the Yahoo! Search engine crawls the page containing the
NOARCHIVE tag or directive. This typically takes place at least once per month.
Connect with Facebook
How to Keep Your Page from Being Cached in Yahoo! Search 
Linear Mode
