“Practical MS-DOS Revised New Edition” (by Koji Murase, ASCII Publishing, 1989) is a technical book that systematically explains the internal structure of MS-DOS and its practical applications. Spanning 351 pages, it covers the knowledge necessary for PC users and programmers of the time to deeply understand the DOS environment and use it efficiently. ◎ Main Structure and Contents of the Book - Chapter 1: Japanese Input Function - Chapter 2: Types of Kanji Codes and Conversion - Chapter 3: RAM Disk, Disk Cache, EMS - Chapter 4: How to Use a Hard Disk - Chapter 5: Creating and Editing Simple Document Files with an Editor - Chapter 6: Explanation of Main MS-DOS Commands by Purpose 【Condition】 ※ The obi (sleeve) is present but has damage on the back. ※ There is some yellowing and discoloration due to aging, but it is generally in good condition with little sign of use.