Amazon Launches Search Engine?"> Amazon Launches Search Engine?

According to the Associated Press: “Amazon’s A9.com Inc., a Palo Alto, Calif.-based subsidiary, was released in test mode Wednesday but will compete for clicks not only with Google Inc., Yahoo! Inc and others, when it launches its own search technology later this year. Like its competitors, A9.com offers both a Web site and an Internet Explorer toolbar from which users can enter search terms and block annoying pop-up ads.”

Our question: what does the 9 in A9 mean? Where they will rank?
>>>Try the sneak preview of A9 here!