Amazon’s http://www.a9.com/ was launched as a beta trial on Wednesday. It will compete for clicks not only with Google Inc., Yahoo! Inc. and others, but also Microsoft Corp. when it launches its own search technology later this year.
Like its competitors, A9.com offers both a website and an Internet Explorer toolbar from which users can enter search terms and block annoying pop-up ads. Searches also can be limited to just Amazon.com products