This excerpt taken from the GOOG 10-K filed Feb 12, 2010.
Android and Google Mobile
Android. Android is a free, open-source mobile software platform that allows developers to create applications for mobile devices and for handset manufacturers to install. Android is being developed with the Open Handset Alliance, a business alliance of 65 technology and mobile companies, with the goal of providing consumers a less expensive and more powerful mobile experience. Today, there are 26 Android devices supported by 60 carriers in 49 countries and 19 languages. We also recently launched the Nexus One, an Android handset sold by Google directly to consumers.
Google Mobile. Google Mobile extends our products and services by providing mobile-specific features, including voice input and location-based technology, to mobile phone users. Specific areas of focus include:
Mobile Search. Our mobile-specific search technologies include:
Mobile Applications. Google Mobile optimizes the majority of Googles applications for mobile phones in both browser and downloadable form. Two of our most popular mobile applications include Gmail and Maps.
Mobile Ads. We offer mobile ad products spanning our advertiser and publisher-focused efforts, Google AdWords, and Google AdSense. Specific mobile ad optimizations include: