Data dump generated by logic simulation programs and saved in a text format; contains header information, variable definitions, and value changes for specified variables; value changes are given in scalar or vector format, based on the type of variable.

File used by the Valve Source game engine; created by the Faceposer tool, which is included with the Source SDK; saves facial expressions, lip-syncs, and motion sequences for actors in the scene; often used for scripting cutscenes.

VCD files are saved in an XML-like text format.

A VCD file is a disc image of a CD or DVD and is recognized by Windows as an actual disc, even though the data is on the hard drive. VCD files allow CDs and DVDs to be used without requiring physical drives and is useful for mounting discs on network computers.

If you receive a VCD file, you can open it with select CD and DVD burning and ripping programs, such as H+H Software Virtual CD, Roxio Popcorn, Roxio Toast, and Roxio Creator NXT Pro. VCD files can also be played with the free MPlayer.