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),
Usage share of operating systems Online usage of Linux kernel derivatives (Google systems + GNU/Linux) exceeds that of Windows. This has been true since some time between January and April 2016, according to W3Counter and StatCounter. But even before that, the figure for all Unix-like OSes, including those from Apple, was higher than that for Windows. Windows is still the dominant desktop OS, but the dominance varies by regions, has gradually lost market share to other desktop operating systems (not just to mobile) with the slide very noticeable in the US, where macOS has more than tripled, from yearly 2009 to 2017, with Windows there