MS-DOS is old, very old by computer standards. It is not compatible with most programs and applications now. It won't run right or at all on most newer computers, printers or anything else.
If you...
Marketing, broad platform and hardware support, extensive software libraries. Microsoft began their dominance with DOS on IBM and compatible PCs, and the first versions of Windows ran under DOS. With...
Microsoft Windows is a line of operating systems.
The types are (In order of Release):
Windows 1
Windows 2
Windows 2.1
Windows 3
Windows NT 3.1
Windows NT 3.5
Windows NT 3.51
Windows...
Read your EULA. The license encourages you, and only you, to use the PC, even if you install sshd or vnc so others can use it. Now ask yourself if Debian Linux is a multiuser operating system.