Interchange File Format

Interchange File Format (IFF), is a generic container file format originally introduced by the Electronic Arts company in 1985 in order to ease transfer of data between software produced by different companies. IFF files do not have any standard extension. On many systems that generate IFF files, file extensions are not important (the OS stores file format metadata separately from the file name). An extension is commonly used for ILBM format files, which use the IFF container format.