3.21 Operating System DOS Microsoft May 1, 1987 MS-DOS 3.21 (Disk 1) ANSI.SYS APPEND.COM ASSIGN.COM ATTRIB.EXE CHKDSK.EXE COMMAND.COM DISKCOMP.EXE DISKCOPY.EXE DRIVER.SYS EDLIN.EXE EXE2BIN.EXE FC.EXE FDISK.EXE FIND.EXE FORMAT.EXE GRAFTABL.EXE GRAPHICS.EXE IO.SYS JOIN.EXE KEYBDV.EXE KEYBFR.EXE KEYBGR.EXE KEYBIT.EXE KEYBSP.EXE KEYBUK.EXE LABEL.EXE MODE.EXE MORE.COM MSDOS.SYS PRINT.EXE RAMDRIVE.SYS RECOVER.EXE REPLACE.EXE SORT.EXE SUBST.EXE SYS.COM MS-DOS 3.21 (Disk 2) BACKUP.EXE DEBUG.EXE GWBASIC.EXE LINK.EXE RESTORE.EXE SHARE.EXE TREE.EXE XCOPY.EXE