4.01 Operating System DOS Microsoft April 1989 MS-DOS 4.01 (360K Disk 1) AUTOEXEC.BAT COMMAND.COM CONFIG.SYS COUNTRY.SYS DISKCOPY.COM DISPLAY.SYS FDISK.EXE FORMAT.COM IO.SYS KEYB.COM KEYBOARD.SYS MSDOS.SYS REPLACE.EXE SELECT.COM SELECT.HLP SELECT.PRT SYS.COM MS-DOS 4.01 (360K Disk 2) ASSIGN.COM ATTRIB.EXE CHKDSK.COM COMMAND.COM COMP.COM DEBUG.COM DISKCOMP.COM EDLIN.COM FC.EXE FILESYS.EXE FIND.EXE IFSFUNC.EXE JOIN.EXE LABEL.COM MEM.EXE MORE.COM SHARE.EXE SORT.EXE SUBST.EXE TREE.COM XCOPY.EXE MS-DOS 4.01 (360K Disk 3) COMMAND.COM EMM386.SYS EXE2BIN.EXE GWBASIC.EXE LINK.EXE PRINT.COM RAMDRIVE.SYS README.TXT SMARTDRV.SYS XMA2EMS.SYS MS-DOS 4.01 (360K Disk 4) 4201.CPI 4208.CPI 5202.CPI ANSI.SYS APPEND.EXE COMMAND.COM COUNTRY.SYS DISPLAY.SYS DRIVER.SYS FASTOPEN.EXE GRAFTABL.COM GRAPHICS.COM GRAPHICS.PRO HIMEM.SYS IO.SYS KEYB.COM KEYBOARD.SYS MODE.COM MSDOS.SYS NLSFUNC.EXE PRINTER.SYS RAMDRIVE.SYS RECOVER.COM MS-DOS 4.01 (360K Disk 5) BACKUP.COM EGA.CPI FORMAT.COM LCD.CPI MODE.COM RESTORE.COM SELECT.DAT SELECT.EXE XMA2EMS.SYS MS-DOS 4.01 (360K Disk 6) CHKDSK.COM COMMAND.COM DISKCOPY.COM DOSUTIL.MEU PCIBMDRV.MOS PRINT.COM SHELL.CLR SHELL.HLP SHELL.MEU SHELLB.COM SHELLC.EXE