In computing, the NetWare File System (NWFS) was a file system based on a heavily optimized, journal-based FAT file system. It was used in the Novell NetWare network operating system. It was the only file system for all volumes in NetWare versions 2.x, 3.x and 4.x, and the default and only file system for the SYS: volume continuing through version 5.x. Novell developed two varieties of NWFS:16-bit NWFS 286, used in NetWare 2.x 32-bit NWFS 386, used in NetWare 3.x through NetWare 6.x.