Copy
The copy command does simply that - it copies one or more files from one location to another.
The copy command is available in all versions of Windows, as well as in MS-DOS.
The xcopy command is considered to be a more "powerful" version of the copy command.
Cscript
The cscript command is used to execute scripts via Microsoft Script Host.
The cscript command is available in all versions of Windows.
The cscript command is most popularly used to manage printers from the command line using scripts like prncnfg, prndrvr, prnmngr, and others.
Ctty
The ctty command is used to change the default input and output devices for the system.
The ctty command is available in Windows 98 and 95 as well as in MS-DOS.
The functions provided by the ctty command were no longer necessary beginning in Windows XP because the command.com interpreter (MS-DOS) is no longer the default command line interpreter.
Date
The date command is used to show or change the current date.
The date command is available in all versions of Windows, as well as in MS-DOS.
Dblspace
The dblspace command is used to create or configure DoubleSpace compressed drives.
The dblspace command is available in Windows 98 and 95, as well as in MS-DOS.
DriveSpace, executed using the drvspace command, is an updated version of DoubleSpace. Windows natively handles compression beginning in Windows XP.
Debug
The debug command starts Debug, a command line application used to test and edit programs.
The debug command is available in MS-DOS as well as in all 32-bit versions of Windows. The debug command is not available in 64-bit versions of Windows.
Defrag
The defrag command is used to defragment a drive you specify. The defrag command is the command line version of Microsoft's Disk Defragmenter.
The defrag command is available in all versions of Windows, as well as in MS-DOS.
Del
The del command is used to delete one or more files.
The del command is available in all versions of Windows, as well as in MS-DOS.
The del command is the same as the erase command.
Deltree
The deltree command is used to delete a directory and all the files and subdirectories within it.
The deltree command is available in Windows 98 and 95, as well as in MS-DOS.
Beginning in Windows XP, a folder and its files and subfolders can be removed using the /s function of the rmdir command. Deltree was no longer needed with this new rmdir ability so the command was removed.
Diantz
The diantz command is used to losslessly compress one or more files. The diantz command is sometimes called Cabinet Maker.
The diantz command is available in Windows 7, Windows Vista, and Windows XP.
The diantz command is the same as the makecab command.
