Microsoft 32-bit file access
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32-bit File Access was a higher performance, protected mode file management introduced in Windows for Workgroups 3.11.
32-bit File Access bypassed MS-DOS and directly accessed the disk, either via the BIOS or (preferably) 32-bit Disk Access (Windows-native protected mode disk drivers). This feature was a backport from the then-unreleased Windows 95, as suggested by Microsoft's advertisements for Windows for Workgroups 3.11 ("the 32-bit file system from our Chicago project"), .
32-bit File Access and the introduction of Long File Names in Windows 95 reduced DOS to the role of a boot loader for Windows.
32-bit File Access was implemented using the VFAT, VCACHE and IFSMgr VxD drivers.
See also: 32-bit Disk Access