Inside Commodore DOS: The Complete Guide to the 1541 Disk Operating System

Graphics Guide to the Commodore 64 by Charles Platt, 1984

Amiga DOS Inside and Out

Commodore AmigaBasic Amiga BASIC Inside and Out

Handbook of BASIC for the Commodore 64-Frederick Mosher and David Schneider

Commodore 64 Games Book 2 (Paperback or Softback)

Inside Atari DOS by Bill Wilkinson 1982 Optimized Systems Software Spiral Bound

Inside AutoCAD Release 12 for DOS: With Disk