MS-DOS MS-DOS ( ; acronym for Microsoft Disk Operating System, also known as Microsoft DOS) is an operating system for x86-based personal computers mostly developed by Microsoft. Collectively, MS-DOS, its rebranding as IBM PC DOS, and a few oper ...

/ PC DOS and some related disk operating systems use the files mentioned here. System Files: *

IO.SYS is an essential part of MS-DOS and Windows 9x. It contains the default MS-DOS device drivers (hardware interfacing routines) and the DOS initialization program. Boot sequence In the PC bootup sequence, the first sector of the boot disk is ...

(or

IBMBIO.COM IBMBIO.COM is a system file in many DOS operating systems. It contains the system initialization code and all built-in device drivers. It also loads the DOS kernel ( IBMDOS.COM) and optional pre-loadable system components (like for disk compre ...

): This contains the system initialization code and builtin device drivers. *

MSDOS.SYS MSDOS.SYS is a system file in MS-DOS and Windows 9x operating systems. In versions of MS-DOS from 1.1x through 6.22, the file comprises the MS-DOS kernel and is responsible for file access and program management. MSDOS.SYS is loaded by the DOS BI ...

(or IBMDOS.COM): This contains the DOS kernel. Command-line interpreter (Shell): *

COMMAND.COM COMMAND.COM is the default command-line interpreter for MS-DOS, Windows 95, Windows 98 and Windows Me. In the case of DOS, it is the default user interface as well. It has an additional role as the usual first program run after boot (init proc ...

: This is the command interpreter. User configuration files: *

AUTOEXEC.BAT AUTOEXEC.BAT is a system file that was originally on DOS-type operating systems. It is a plain-text batch file in the root directory of the boot device. The name of the file is an abbreviation of "automatic execution", which describes its functio ...

: This is run by the default shell (usually COMMAND.COM) to execute commands at startup. *

CONFIG.SYS CONFIG.SYS is the primary configuration file for the DOS and OS/2 operating systems. It is a special ASCII text file that contains user-accessible setup or configuration directives evaluated by the operating system's DOS BIOS (typically residing ...

: This contains statements to configure DOS and load device drivers. Standard DOS utility programs: *

APPEND In computer programming, append is the operation for concatenating linked lists or arrays in some high-level programming languages. Lisp Append originates in the Lisp programming language. The append procedure takes zero or more (linked) lists a ...

: 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 In information technology, a backup, or data backup is a copy of computer data taken and stored elsewhere so that it may be used to restore the original after a data loss event. The verb form, referring to the process of doing so, is "back up", w ...

/ RESTORE: simple backup and restore utilities. *

CHKDSK In computing, CHKDSK (short for "check disk") is a system tool and command in DOS, Digital Research FlexOS, IBM/ Toshiba 4690 OS, IBM OS/2, Microsoft Windows and related operating systems. It verifies the file system integrity of a volu ...

: Check disk for file system integrity. *

COMP Comp, COMP or Comps may refer to: Places In England: * Comp, Kent In France: * Comps, Drôme * Comps, Gard * Comps, Gironde * Comps-la-Grand-Ville * Comps-sur-Artuby Arts, entertainment, and media ;Music *Accompaniment, especially in jazz ...

: File compare utility. *

DEBUG In computer programming and software development, debugging is the process of finding and resolving '' bugs'' (defects or problems that prevent correct operation) within computer programs, software, or systems. Debugging tactics can involve ...

: Simple command line debugger. *

DELTREE In computing, DELTREE (short for ''delete tree'') is a command line command in some Microsoft operating systems, SpartaDOS X and FreeDOS that recursively deletes an entire subdirectory of files. Overview When IBM and Microsoft introduced PC DOS 1 ...

: Delete a directory tree. * DISKCOMP: Compare floppy disks. *

DISKCOPY In computing, diskcopy is a command used on a number of operating systems for copying the complete contents of a diskette to another diskette. Implementations The command is available in MS-DOS, IBM PC DOS, DR FlexOS, IBM/Toshiba 4690 OS, M ...

: Copy floppy disks. *

DOSKEY DOSKEY is a command for DOS, IBM OS/2, Microsoft Windows, and ReactOS that adds command history, macro functionality, and improved editing features to the command-line interpreters COMMAND.COM and cmd.exe. History The command was included ...

: Command line editor. *

EDIT Edit may refer to: Concepts * an action that is part of an editing process (including of images, video, and film) * a particular version that is the result of editing, especially of film (for example, fan edit), or music (for example, radi ...

/ EDLIN: Very basic text editor(s); EDLIN is in earlier versions. * FC: File compare utility. *

FDISK In computing, the fdisk command-line utility provides disk-partitioning functions, preparatory to defining file systems. fdisk features in the DOS, DR FlexOS, IBM OS/2, and Microsoft Windows operating systems, and in certain ports of ...

: Partitions fixed disks. * FIND: Find text in files. * FORMAT: Formats disks. *

JOIN Join may refer to: * Join (law), to include additional counts or additional defendants on an indictment *In mathematics: ** Join (mathematics), a least upper bound of sets orders in lattice theory ** Join (topology), an operation combining two topo ...

: Joins a drive letter to a subdirectory. * LABEL: Set or remove a disk volume label. * MEM: Display memory usage. *

MODE Mode ( la, modus meaning "manner, tune, measure, due measure, rhythm, melody") may refer to: Arts and entertainment * '' MO''D''E (magazine)'', a defunct U.S. women's fashion magazine * ''Mode'' magazine, a fictional fashion magazine which is ...

: Set modes for system devices. *

MORE More or Mores may refer to: Computing * MORE (application), outline software for Mac OS * more (command), a shell command * MORE protocol, a routing protocol * Missouri Research and Education Network Music Albums * ''More!'' (album), by Booka ...

: 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 In computing, SUBST is a command on the DOS, IBM OS/2, Microsoft Windows and ReactOS operating systems used for substituting paths on physical and logical drives as virtual drives. Overview In MS-DOS, the SUBST command was added with the rel ...

: 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.

References

{{DOS system files DOS files