|Component of Microsoft Windows|
|Other names||HIMEM (often simply referred as such)|
|Introduced in||Windows 3.0|
IBM DOS 5
IBM PC DOS
|Last included in||Windows Me|
HIMEM.SYS (often simply referred to as HIMEM), is a device driver file for MS-DOS and other DOS systems that enables them to use more than the conventional 640 KB of RAM. This area of memory access is also commonly referred to as the „High Menory Area“ (HMA). It is required by Windows/386 2.xx and Windows 3.x to run in 386 Enhanced Mode.