Android (operating system) and rival Linux mobile operating systems that were in development. These established players were skeptical: Nokia was quoted as saying "we don't see this as a threat," and a member of Microsoft's Windows Mobile team stated "I don't understand the impact that they are going to have." Since then Android has grown to become the most widely used smartphone operating system and "one of the fastest mobile experiences available". Reviewers have highlighted the open-source nature of the operating system as one of its defining strengths, allowing companies such as Nokia (Nokia X family), Amazon (Kindle Fire), Barnes & Noble (Nook),
Hybrid electric vehicles in the United States 44.8%, down from 51.5% in the year 2012, while Ford Motor Company increased its market share of the conventional hybrid market from 7.5% in 2012 to 14.7% in 2013. Ford experienced record sales of its hybrids models in the U.S. during 2013, with 72,795 units sold, almost triple the 2012 total. During the second quarter of 2013 Ford achieved its best hybrid sales quarter ever, up 517% over the same quarter of 2012. In 2013 Toyota’s hybrid market share in the U.S. declined from 2012 totals due to new competition, particularly from Ford with the arrival of new products such