[3] The Microsoft implementation is mostly known through container formats like AVI, ANI and WAV, which use RIFF as their basis.
[4] RIFF was introduced in 1991 by Microsoft and IBM and used as the default format for Windows 3.1 multimedia files.
IFF uses the big-endian convention of the Amiga's Motorola 68000 CPU, but in RIFF multi-byte integers are stored in the little-endian order of the x86 processors used in IBM PC compatibles.
RF64 is a multichannel file format based on RIFF specification, developed by the European Broadcasting Union.
The optional INFO chunk allows RIFF files to be "tagged" with information falling into a number of predefined categories, such as copyright ("ICOP"), comments ("ICMT"), artist ("IART"), in a standardised way.
This has resulted in two different conventions for chunk placement, with the attendant risk that some combinations of software can cause a file's INFO data to be ignored or permanently overwritten during editing.
RIFF information tags are found in WAV audio and AVI video files.