Compare usages for more than two types of  operating system. for example, how to create directory？
There are different ways to create directory  on the different operating system .Below are how to create a directory in Microsoft Windows and Linux.

Creating a folder in Linux
Create a folder in a directory:Open Finder and navigate to the directory in which you'd like to create the folder. Click on File in the upper left-hand corner of the screen.Select New Folder in the drop-down menu that appears. Name the folder, and then press Return.
Creating a directory in Microsoft Windows
Navigate to the Windows Desktop. Right-click with your mouse on any blank portion of the Desktop. In the menu that appears (like that shown in the picture to the right), click New and then Folder.A new folder will appear. Type the name of the folder you want to use and then press Enter.