With the introduction of the 80386, the memory management features were enhanced to allow the system to shift into protected mode but also allow the addresses to be configured in a virtual 8086 mode so that the extended memory can be mapped into addressing frames and accessible to real-mode programs such as DOS. This allows a 386 to implement the LIM (Lotus, Intel, Microsoft) EMS (expanded memory specification). The memory manager is easily controlled by the user with DOS program QEMM.COM.