1）

I know that computer operating systems commonly used are windows Mac OS X and Linux. I Also know that the operating system used in mobile phones are Android ios.

2）

I am using windows android and ios now I have used Mac OS X and never have used Linx.

3）

Windows:

After Windows operating system born because of its intuitive and simple window interface and a mouse click way to change the past non professional personnel to operate the computer the difficult problem of dev