The purpose of this book is to take some of the misery and mystery out of learning to use the Commodore-64 's file structure. The book is aimed at people who would like to learn to use the computer to assist them at home or at work by using the file capabilities of the Commodore-64 personal computer. Commodore-64 Data Files: A BASIC Tutorial is designed as a step-by-step tutorial. The book explains some things that, without adequate manuals, take many painful hours of trial and error to learn. Progress has been made in creating better file-handling techniques and an explanation of some of these techniques is included.