FUZZ1.DSK, FUZZ2.DSK, FUZZ3.DSK, NSF.DSK 5.25" floppy disk disk images for the Fuzzball operating system and Internet applications for the PDP11 family of computers. These are in RT-11 file system format suitable for copying to double-density, double-side media. The Fuzzball operating system was used in the NSFnet Phase-1 Backbone during the period 1986-1988 and is probably of historic interest only.