A. FAT16
B. FAT32
C. NTFS
D. WNFS
DOS (Disk Operating System) typically uses the FAT (File Allocation Table) file system. The FAT file system is a simple and straight forward file system that was widely used in the early days of personal computing. There are different versions of the FAT file system, including FAT12, FAT16, and FAT32, each supporting varying capacities and features.