Windows file system which can address 2 ¹⁶ clusters (65,536). With a cluster size range of 2KB to 32KB, a maximum file size of 2GB is possible. Confusingly enough, there is an implementation of FAT16 that allow for a 64KB cluster size increasing the maximum file size to 4GB however this version of FAT16 only works in a few select versions of Windows (Windows 98 and Windows NT).

See FAT file system for an overview of this file system.