This manual has two parts. The first part discusses how the FAT file system and MS DOS partitions work, as well as how files can be undeleted. The second part is the documentation for the Fatback program itself. Users who are inexperienced with the FAT file system are encouraged to read the first part. More seasoned veterans of forensics might also find it to be a handy reference when working with some of the more advanced features of Fatback.