QEMM
Quarterdeck Expanded Memory Manager (QEMM, /ˈkwɛm/, though not by those who developed it), was a memory manager produced by Quarterdeck Office Systems in the late 1980s through late 1990s. It was the most popular memory manager for the MS-DOS and other DOS operating systems.
Read more about QEMM: QEMM Product Ranges, Competitors, QEMM History, DOS Equivalents, Windows Transition / Decline of QEMM