Microsoft KB Archive/63906

= MS-DOS 1.x-6.22 System File Naming Conventions =

Article ID: 63906

Article Last Modified on 11/16/2006

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APPLIES TO


 * Microsoft MS-DOS 1.0 Standard Edition
 * Microsoft MS-DOS 2.11 Standard Edition
 * Microsoft MS-DOS 3.1
 * Microsoft MS-DOS 3.2 Standard Edition
 * Microsoft MS-DOS 3.21 Standard Edition
 * Microsoft MS-DOS 3.3 Standard Edition
 * Microsoft MS-DOS 3.3a
 * Microsoft MS-DOS 4.0 Standard Edition
 * Microsoft MS-DOS 4.01 Standard Edition
 * Microsoft MS-DOS 5.0 Standard Edition
 * Microsoft MS-DOS 5.0a
 * Microsoft MS-DOS 6.0 Standard Edition
 * Microsoft MS-DOS 6.2 Standard Edition
 * Microsoft MS-DOS 6.21 Standard Edition
 * Microsoft MS-DOS 6.22 Standard Edition

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This article was previously published under Q63906



SUMMARY
The two most frequently used naming conventions for system files are the ones used by Microsoft MS-DOS and IBM for PC-DOS. They are as follows:   Filename                Product ---  IO.SYS/MS-DOS.SYS       Microsoft MS-DOS IBMBIO.COM/IBMDOS.COM  IBM PC-DOS



MORE INFORMATION
These are not the only names used for system files, but they are the most common. The following is a list of some original equipment manufacturer (OEM) versions of DOS and their system filenames: OEM           Versions            System Filenames

AT&T          3.1, 3.2, 3.30a     IBMBIO.COM     IBMDOS.COM Bluechip      3.2                 IO.SYS         MSDOS.SYS Compaq        1.1, 1.11           IOSYS.COM      MSDOS.COM Compaq        2.01+               IBMBIO.COM     MSDOS.COM Dell          3.3                 IO.SYS         MSDOS.SYS DTK           4.01                IO.SYS         MSDOS.SYS EPC/EMPAC     4.01                IO.SYS         MSDOS.SYS HP Vectra     3.2                 IBMBIO.COM     IBMDOS.COM ITT           2.11, 3.10          IBMBIO.COM     IBMDOS.COM IBM           All                 IBMBIO.COM     IBMDOS.COM Intel         4.01                IO.SYS         MSDOS.SYS Lyi-Cheng     4.01                IO.SYS         MSDOS.SYS Microsoft     All                 IO.SYS         MSDOS.SYS NCR           2.11                IO.SYS         MSDOS.SYS NCR           3.20.20             IBMBIO.COM     IBMDOS.COM Northgate     4.0                 IO.SYS         MSDOS.SYS Parcorp       3.3                 IO.SYS         MSDOS.SYS Phoenix       4.01                IO.SYS         MSDOS.SYS Sperry        3.2                 MIO.SYS        MSDOS.SYS Tandy         2.11                IO.SYS         MSDOS.SYS Tandy         3.1, 3.2, 3.3       IBMBIO.COM     IBMDOS.COM Telex         3.21                IO.SYS         MSDOS.SYS Wang          2.11                BIOS.SYS       MSDOS.SYS Wyse          3.1, 3.21, 3.3      IBMBIO.COM     IBMDOS.COM Zenith        2.11, 3.21          IBMBIO.COM     IBMDOS.COM NOTE: This is not a complete list of OEMs; only the listed versions were checked.

Additional query words: 6.22 1.x 2.x 3.x 4.00 4.01 4.01a 5.00 5.00a 6.00 6.20

Keywords: KB63906

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