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),
Market share of personal computer vendors Market share of personal computer vendors The annual worldwide market share of personal computer vendors includes desktop computers, laptop computers and netbooks, but excludes mobile devices, such as tablet computers that do not fall under the category of 2-in-1 PCs. Sales volume worldwide grew rapidly in the late 1990s but declined during the early 2000s recession. Sales increased again for the rest of the decade though more slowly in the late 2000s recession. After a substantial growth into 2010, sales volume has remained fairly stable, until a substantial dip starting in 2013. (*) Figures include desktop PCs, mobile PCs, and