VCD, Virtual CD (.vcd)
The VCD Misc file format
The VCD file format has been developed by H+H in order to create a copy of a CD or DVD. VCD files are disc images which means they contain an exact copy of the content of a media disc. These files were not only created for storing backup, but for running a CD or DVD without the need for an actual, physical copy.
Technical details of VCD files
VCD files are interpreted from a computer in the same way a physical DVD or CD would be interpreted. Instead of a real disc, however, the disc image is merely a file on a computer's hard drive. This comes especially in handy to install software or run DVDs on a laptop that does not have a disc drive available. Mounting discs on a network of computers is made a lot easier and faster using VCD files as well.