IFF

Overview
IFF is a file format introduced by Electronic Arts on the Commodore Amiga computer. Its structure is similar to RIFF or PNG, using various self-contained chunks to contain different data.

Although IFF is most commonly used as an image format (using the file extension ), it can actually hold a lot of different data types. Some examples of IFF files are
 * LBM images
 * XMI XMidi music files
 * 8SVX audio sample data

Resources

 * The original EA spec
 * IFF chunk registry, defining all known chunks
 * ReWiki has a page on IFF, including some details on the rare PBM variant of LBM