title: List of DOS system files
text: # List of DOS system files
  
  MS-DOS / PC DOS and some related disk operating systems use the files mentioned here.
  
  System Files:
  
  * IO.SYS (or IBMBIO.COM): This contains the system initialization code and builtin device drivers;
  * MSDOS.SYS (or IBMDOS.COM): This contains the DOS kernel.
  
  Command-line interpreter (Shell):
  
  User configuration files:
  
  * AUTOEXEC.BAT: This is run by the default shell (usually COMMAND.COM) to execute commands at startup.
  * CONFIG.SYS: This contains statements to configure DOS and load device drivers.
  
  Standard DOS utility programs:
  
  * APPEND: Set a search path for data files.
  * ASSIGN: Redirect requests for disk operations on one drive to a different drive.
  * ATTRIB: Set or display file attributes.
  * BACKUP / RESTORE: simple backup and restore utilities.
  * CHKDSK: Check disk for file system integrity.
  * COMP: File compare utility.
  * DEBUG: Simple command line debugger.
  * DELTREE: Delete a directory tree.
  * DISKCOMP: Compare floppy disks.
  * DISKCOPY: Copy floppy disks.
  * DOSKEY: Command line editor.
  * EDIT / EDLIN: Very basic text editor(s); EDLIN is in earlier versions.
  * FC: File compare utility.
  * FDISK: Partitions fixed disks.
  * FIND: Find text in files.
  * FORMAT: Formats disks.
  * JOIN: Joins a drive letter to a subdirectory.
  * LABEL: Set or remove a disk volume label.
  * MEM: Display memory usage.
  * MODE: Set modes for system devices.
  * MORE: Display output one screen at a time.
  * MOVE: Move files from one directory to another.
  * PRINT: Print spooler.
  * REPLACE: Replace files.
  * SHARE: File sharing and locking support.
  * SORT: Sorts input.
  * SUBST: Substitutes a drive letter for a subdirectory.
  * SYS: Transfers the system files to another drive to make it bootable.
  * TREE: Display a directory tree.
  * XCOPY: Extended file copy.
  
  Standard DOS device drivers:
  
  * ANSI.SYS: ANSI console driver.
  * EMM386.EXE: Expanded memory manager.
  * HIMEM.SYS: Extended memory manager.
  * RAMDRIVE.SYS / VDISK.SYS: RAM disk; VDISK.SYS is in older versions of PC DOS.
  