Advantage Android, there are literally hundreds of developers working on custom ROMs for most common models of phones and tablets and they are happy to share with the community. (mobilegeeks.com)
Currently this is the most common model of ebook distribution. (publishdrive.com)
One of the most common models pools a company's profits and then distributes a portion of them to employees either in retirement accounts, or as a cash bonus. (inc.com)