you need to scroll down in your link. https://en.wikipedia.org/wiki/Email_address#Sub-addressing
Because the Surface PRO runs full desktop Photoshop, Visual Studio, Office, Hyper-v and Skrim. You can also plug in a full USB keyboard and mouse (the OS supports a pointer), use a digitizer pen or an XBox controller.
you need to scroll down in your link. https://en.wikipedia.org/wiki/Email_address#Sub-addressing
Because the Surface PRO runs full desktop Photoshop, Visual Studio, Office, Hyper-v and Skrim. You can also plug in a full USB keyboard and mouse (the OS supports a pointer), use a digitizer pen or an XBox controller.