 
                
 
                
                Runs directly on the hardware.
                
                This makes it essentially an OS.
                
                
                
                Type 1 video
                
 
                
                This is a program that runs in an underlying OS. For example,
                Parallels runs on MacOS, and allows Windows or Linux to run on
                it.
                
                
                Also called hosted hypervisors.
                
                
                It installs a guest OS by pretending it is a machine being
                booted for the first time, and installing the OS from media,
                onto a "disk" (that is really an ordinary OS file).
                
                
                
                Type 2 video
                
1. b; 2. a; 3. b;