VDD may refer to any of the following:
1. Short for Virtual Device Driver, a VDD is a file similar to VXD files that allows access to hardware devices through MS-DOS based applications.
2. Short for Virtual Database Definition, a VDD is a file used to store objects used to describe database sources.
3. Short for Virtual Disk Drive, VDD is a disk drive or storage location located on another computer or server that can be accessed through a network or the Internet.