This reference text presents information every DOS user, from beginners to advanced, should need to work effectively with DOS. The book contains 46 chapters, each consisting of a beginner's section, hands-on examples, advanced concepts, a summary and key terms. The author also provides a complete command reference, organized by alphabetical order. Readers should find all the answers to their DOS questions in this book. The book features illustrations, notes, warnings and exercises designed to make learning DOS as simple as possible. The book is composed of 46 chapters, a command reference and several appendices. The opening chapters introduce readers to DOS fundamentals, directories, printing, and batch files. The author describes the AUTOEXEC.BAT, BACKUP and RESTORE, CONFIG.SYS, CHKDSK and other essential commands, as well as macros, in the following chapters. The next chapters focus on maximizing the computer system with DOS. The last chapters discuss advanced techniques such as using the DOS shell and disk partitioning. Appendices cover ASCII and extended ASCII character sets, DOS shell menu maps, installation and error messages.