Fatdog is an all 64bit version of Linux built from source packages and using Puppy Linux scripts and structure. Fatdog is quite 'fat' compaired to Puppy, the complete Xorg is included along with other extras that make it larger than Puppy. Other differences include Firefox, VLC, Thunderbird, and Pidgin running as a non-privileged user (spot), automatic Xorg configuration, default localization (see the setup wizards to make adjustments). You'll find CUPS in your browser's bookmarks if you want to add a printer.
Development of Fatdog64 600 series has ended.
Development work has moved to the next generation Fatdog64, the 700 series.