<software, storage> (XMM) The memory manager software implementing Extended Memory Specification, such as HIMEM or QEMM386. XMM's can usually also act as A20 handlers.
(1996-01-10)
Try this search on Wikipedia, OneLook, Google
Nearby terms: eXtended Graphics Array « Extended Industry-Standard Architecture « extended memory « extended memory manager » Extended Memory Specification » Extended ML » Extended Pascal