sentences:  Novell DOS 7 introduced much advanced memory management including new support for DPMI (DOS Protected Mode Interface) and DPMS (DOS Protected Mode Services) as well as more flexible loadhigh options.It also introduced support for "true" pre-emptive multitasking of multiple DOS applications in virtual DOS machines (VDM), a component originally named MultiMAX.This was similar to Multiuser DOS, but now on the basis of a natively DOS compatible environment, similar to Windows 386 Enhanced Mode, but without a GUI.