windows skipped the 9 ,yes! yes! windows jumped to version 10 and officially unveiled the windows 10 on sep30 and started the "INSIDER PROGRAM" on oct1,providing the technical preview of windows 10 to developers and geeks.
They said it fits in all devices and adjusts itself and suits the device by making changes to suit the device by recognizing the device ,they added it will be like a tailor made for all the devices.
Most of the windows 7 features which were not there in 8 are added in this version like start menu & aero....
There are some new features like multiple desktops also...