4.01 Operating System DOS Microsoft April 1989 MS-DOS 4.01 (720K Disk 1) 4201.CPI 4208.CPI 5202.CPI ANSI.SYS AUTOEXEC.BAT COMMAND.COM CONFIG.SYS COUNTRY.SYS DISKCOPY.COM DISPLAY.SYS DRIVER.SYS EGA.CPI FASTOPEN.EXE FDISK.EXE FORMAT.COM GRAFTABL.COM GRAPHICS.COM GRAPHICS.PRO HIMEM.SYS IO.SYS KEYB.COM KEYBOARD.SYS LCD.CPI MSDOS.SYS NLSFUNC.EXE PRINT.COM PRINTER.SYS RAMDRIVE.SYS REPLACE.EXE SELECT.DAT SELECT.EXE SELECT.HLP SELECT.PRT SHARE.EXE SMARTDRV.SYS SYS.COM XMA2EMS.SYS MS-DOS 4.01 (720K Disk 2) APPEND.EXE ASSIGN.COM ATTRIB.EXE BACKUP.COM CHKDSK.COM COMMAND.COM COMP.COM DEBUG.COM DISKCOMP.COM DISKCOPY.COM EDLIN.COM EMM386.SYS EXE2BIN.EXE FC.EXE FILESYS.EXE FIND.EXE GWBASIC.EXE IFSFUNC.EXE JOIN.EXE LABEL.COM LINK.EXE MEM.EXE MODE.COM MORE.COM PRINT.COM README.TXT RECOVER.COM REPLACE.EXE RESTORE.COM SORT.EXE SUBST.EXE TREE.COM XCOPY.EXE MS-DOS 4.01 (720K Disk 3) 4201.CPI 4208.CPI 5202.CPI ANSI.SYS BACKUP.COM COMMAND.COM COUNTRY.SYS DISKCOMP.COM DISKCOPY.COM DISPLAY.SYS DOSUTIL.MEU DRIVER.SYS EGA.CPI FORMAT.COM GRAFTABL.COM GRAPHICS.COM GRAPHICS.PRO IO.SYS KEYB.COM KEYBOARD.SYS LCD.CPI MODE.COM MSDOS.SYS PCIBMDRV.MOS PRINT.COM PRINTER.SYS RESTORE.COM SHELL.CLR SHELL.HLP SHELL.MEU SHELLB.COM SHELLC.EXE