Container file format developed by Electronic Arts and Commodore back in 1985. As this format is simply a wrapper, the actual data inside can be anything from audio (most common) to images and video.

The actual format itself is made up of sections called 'chunks', which are defined by four-letter IDs. The three types of chunks are:

FORM - defines the format of the file
LIST - includes the properties of the file
CAT - includes the remaining data