A9.com

A9.com is into providing product search services on Amazon and many e-commerce websites. A9.com is a subsidiary of Amazon.

Offices: Palo Alto, California and Bangalore, India
Areas of work: Search(product search specifically)


The interface is pleasing enough and A9 is a good platform for searching for products. Especially, the product description section has enough detail about the features of the product.

The interface also features the 'suggest' facility giving us hints of few possible combinations of phrases.
From the job profile provided by A9(Please report if the link is broken), I guess, the company is involved in Information Extraction, Data Mining. And seems they are also trying to use log files(feedback for improvement).
A9 is another company that works in computational linguistics, natural language processing and information retrieval.