List of DOS system files
# 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.
