A9.com, a start-up owned by Amazon.com, plans an advanced technology that the company says will take searches beyond mere retrieval of Web pages to let users more fully manage the information they find.

The new A9.com service, launched Tuesday night, offers users the ability to store and edit bookmarks on an A9.com central server computer, keep track of each link clicked on previous visits to a Web page, and even make personal “diary” notes on those pages for viewing on subsequent visits.