As like the android mobile devices are most popular in world overall 75% of mobile user uses android phones. The windows is also a biggest seller in the computer market. This is I think the best operating system over the world. I had recently bought a new windows 10 phone. I have also a PC running on windows 10 platform. I think this is best because it is extremely different from the old windows OS. The most unique and biggest change is It has a same coding language for all windows devices. As they can be phones or a PC or a Tablet or any windows device. It has a new windows store. Before this applications need to download from there developers website but now windows 10 has its own app store to provide apps. This app store is same for all windows devices(phones, PC, Tablet, HoloLens, hub.) . Windows 10 is more secure than befor now by using windows hello. Windows 10 has it’s own voice assistant called as cortana and also it is developing very fastly than I was expected, this assistant can replace some of the applications like wether application, cortana is able to provide whether information by asking her about weather. These are some of the biggest changes I observed in windows 10. It is still in development so I think this platform is now the best and will be aslo the best forever. I honestly love this because it is changeing with change in our world.