MS-DOS 7

MS-DOS 7 is the real mode DOS kernel that Microsoft built into the Windows 9x family rather than releasing as a standalone product, living inside the IO.SYS file that underlies Windows 95 and Windows 98. Version 7.0 shipped with the original release of Windows 95, and version 7.1 shipped with Windows 95 OSR2 and Windows 98, adding VFAT support for long filenames, extended memory support up to 4 gigabytes through HIMEM.SYS, logical block addressing for larger hard drives, and, in 7.1, FAT32 support for volumes up to 2 terabytes. Industry observers described Windows 95 itself as effectively a combination of two products, MS-DOS 7.0 and Windows 4.0, packaged to look like one, marking Microsoft's shift away from marketing DOS as an independent product. This description is adapted from Wikipedia contributors under CC BY-SA 4.0; changes were made. https://creativecommons.org/licenses/by-sa/4.0/