1. 4.2. INTRODUCTION TO DOS
      1. 4.2.1. THE BOOT
        1. 4.2.1.1. BACKGROUND
        2. 4.2.1.2. BOOTING DOS
        3. 4.2.1.3. LEAVING DOS
      2. 4.2.2. FILE SPECIFICATION
        1. 4.2.2.1. COMPLETE FILE SPECIFICATIONS
        2. 4.2.2.2. WILDCARD SYMBOLS
      3. 4.2.3. CONTROL SEQUENCES
      4. 4.2.4. DOS COMMANDS
        1. 4.2.4.1. FORMAT
        2. 4.2.4.2. DIR
        3. 4.2.4.3. DEL
        4. 4.2.4.4. COPY
        5. 4.2.4.5. RENAME
        6. 4.2.4.6. TYPE
        7. 4.2.4.7. DISKCOPY
        8. 4.2.4.8. CHKDSK
      5. 4.2.5. ADVANCED DOS
        1. 4.2.5.1. DEVICES
        2. 4.2.5.2. FILES NECESSARY FOR DOS
        3. 4.2.5.3. REDIRECTION OF I/O
        4. 4.2.5.4. DOS DIRECTORIES
        5. 4.2.5.5. CURRENT PATH
        6. 4.2.5.6. COMMAND FILES
        7. 4.2.5.7. SOME USEFUL DOS COMMANDS
        8. 4.2.5.8. VIRUS PROTECTION