Dir
The dir command is used to display a list of files and folders contained inside the folder that you are currently working in. The dir command also displays other important information like the hard drive's serial number, the total number of files listed, their combined size, the total amount of free space left on the drive, and more.
The dir command is available in all versions of Windows, as well as in MS-DOS.
Diskcomp
The diskcomp command is used to compare the contents of two floppy disks.
The diskcomp command is available in all versions of Windows, as well as in MS-DOS.
Diskcopy
The diskcopy command is used to copy the entire contents of one floppy disk to another.
The diskcopy command is available in all versions of Windows, as well as in MS-DOS.
Diskpart
The diskpart command is used to create, manage, and delete hard drive partitions.
The diskpart command is available in Windows 8, Windows 7, Windows Vista, and Windows XP.
The diskpart command replaced the fdisk command beginning in Windows XP.
Diskperf
The diskperf command is used to manage disk performance counters remotely.
The diskperf command is available in Windows 8, Windows 7, Windows Vista, and Windows XP.
Diskraid
The diskraid command starts the DiskRAID tool which is used to manage and configure RAID arrays.
The diskraid command is available in Windows 8, Windows 7, and Windows Vista.
Dism
The dism command starts the Deployment Image Servicing and Management tool (DISM). The DISM tool is used to manage features in Windows images.
The dism command is available in Windows 8 and Windows 7.
Dispdiag
The dispdiag command is used to output a log of information about the display system.
The dispdiag command is available in Windows 8, Windows 7, and Windows Vista.
Djoin
The djoin command is used to create a new computer account in a domain.
The djoin command is available in Windows 8, Windows 7, and Windows Vista.
Doskey
The doskey command is used to edit command lines, create macros, and recall previously entered commands.
The doskey command is available in all versions of Windows, as well as in MS-DOS.
