An operating system Cracker (OS) is, in the most general sense, software that allows a user to run other applications on a computer. The operating system manages the software resources of a computer, in particular: input devices such as a keyboard and a mouse. The dominant desktop operating system software cracker is Microsoft Windows with a market share of around 82.74%. MacOS from Apple Inc. is in second place (13.23%) and Linux variants are together in third place (1.57%). In the mobile communications sector (including smartphones and tablets), Android represented up to 70% in 2017. According to the third quarter of 2016, Android’s share in smartphones dominates with 87.5% and a rate of growth of 10.3% per year. followed by Apple’s iOS at 12.1% and an annual decline of 5.2% in market share, while other operating systems account for only 0.3%. operating system code crack Linux distributions dominate in the domain of servers and supercomputers. For many applications, there are other specialized classes of operating systems, such as embedded systems and real-time systems.