DOCUMENT:Q63906 17-DEC-2000 [msdos] TITLE :MS-DOS 1.x-6.22 System File Naming Conventions PRODUCT :Microsoft Disk Operating System PROD/VER:MS-DOS:1.x,2.x,3.x,4.x,5.x,6.0,6.2,6.21,6.22 OPER/SYS: KEYWORDS: ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft MS-DOS operating system versions 1.x, 2.11, 3.1, 3.2, 3.21, 3.3, 3.3a, 4.0, 4.01, 5.0, 5.0a, 6.0, 6.2, 6.21, 6.22 ------------------------------------------------------------------------------- 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 : Technology : kbMSDOSSearch kbMSDOS321 kbMSDOS400 kbMSDOS1xSearch kbMSDOS320 kbMSDOS330a kbMSDOS621 kbMSDOS622 kbMSDOS620 kbMSDOS600 kbMSDOS310 kbMSDOS500 kbMSDOS330 kbMSDOS401 kbMSDOS500a kbMSDOS211 Version : MS-DOS:1.x,2.x,3.x,4.x,5.x,6.0,6.2,6.21,6.22 ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2000.