On March 31, 2017 (March 4, 2017 in the lunar calendar), Android defeated Windows and officially became the world's largest operating system. According to IDC data, PC sales have not increased much since 2008, hovering around 300 million units per year. The agency estimates that PC sales in 2016 were only about 260 million units. Obviously, the era of PC is almost over. Android has once again set a milestone. According to the data of about 15 billion visits compiled from 250 websites by StatCounter, the traffic generated by Android devices surpassed that of WindowsPC for the first time in March 2017, taking the crown of the largest operating system from the latter. "This is a milestone in the history of science and technology and represents the end of an era," commented StatCounterCEO Odhan Cullen. Specifically, Android contributed 37.93% of the entire network traffic last month, while traffic from Windows devices still accounted for 37.91%-so, Android is a "narrow victory" this time. Since the 1980s, the Windows operating system developed by Microsoft has been the absolute king of operating systems. However, with the birth of Android and its adoption by major mainstream mobile device manufacturers, countless new mobile device forms and companies that manufacture them have been born. This mobile operating system developed by Google has only accounted for 2.4% of the total network traffic five years ago, and it has become what it is today. Asia, especially China and Southeast Asian countries, have not experienced a relatively long period of PC rule, but have directly entered the mobile era, thus becoming the region with the fastest popularization of Android operating system. According to StatCounter data, Android contributed as much as 52.2% of traffic in Asia, while Windows only contributed 29.2%; In Europe, where PC popularity is high but smartphones are not so popular, the situation is completely opposite. Windows contributes 51.7% of traffic, while Android only contributes 23.6%; In North America, the situation is relatively average, with Windows, iOS and Android being 39.5%, 25.7% and 21.2% respectively. The graph below shows the number one operating system in different national and regional markets: If there is a short reason to explain Android's victory today, then the word "ecosystem" is perfect. In 2005, Google acquired Android Inc. founded by Andy Rubin, and launched the first generation of Android in 2007, and put forward the concept of "Open Handset Alliance" (Open Handset Alliance). The core code of Android is open source, which means that any mobile device manufacturer can copy a source code for processing, development and adaptation, and then launch its own Android phone (provided that it joins OHA and establishes a cooperative relationship with Google). According to the statistics of Google and the calculation of the number of "non-GoogleAndroid" devices in China, as of 2016, at least 2.5 billion devices worldwide were running the Android operating system. In contrast, according to data compiled by BenidictEvans, a partner at a16z, a well-known investment institution, as of 2016, there were less than 900 million devices running the iOS operating system (iPhone, iPad and a few iPodtouch) worldwide. This situation is also reflected in the data icon of StatCounter (the first one in this article). Before 2013, the traffic contributed by iOS devices (gray line) was slightly higher than that of Android (green line), but since 2013, the explosive growth of Android has been obvious, from 7% in March 2013 to 2017 37.93% in March; However, iOS is subject to factors such as a single brand and high device price, and has not made much progress. However, at least in terms of revenue, iOS has pulled back a city. In January this year, statistics from AppAnnie, a mobile application analysis platform, found that more than half of the revenue from the mobile application market (AppStore, GooglePlay) in 2016 was taken away by Apple, about $24 billion. However, the agency also pointed out that if the revenue of a large number of third-party application malls in China and other markets is included, the total revenue of Android's malls may surpass that of Apple in 2017. Android, which came out in 2007, is still overwhelming ten years later.