Linux has been in commercial use since 1992 and is successfully deployed in everything from wristwatches to supercomputers. Linux runs on many server systems for databases, web sites and groupware around the globe. It is estimated that 2/3 of all web servers use Linux as their operating system. Operating systems like Android on cell phones and tablets, as well as many smart TVs are based on Linux. Routers, printers, NAS and many other devices in the IT world run on Linux. And last but not least, many developers of embedded devices in various industry segments, such as medical, automotive, aerospace or automation, rely on the modularity, security and robustness of Linux as a platform.