The basic building block of a Resource Interchange File Format (RIFF) file, consisting of an identifier (called a chunk identifier), a chunk-size variable, and a chunk data area of variable size.
The basic component of a SCUMM data file. A chunk is a block of data that starts with a chunk tag; a two or four byte indentifier of the type of data stored in the chunk, and the length of the chunk. The rest of the chunk can be data of any type and may contain child chunks.
The basic building block of a RIFF file. See also subchunk.
The fundamental building block of a PNG file and the means by which the specification may be extended in a backward- and forward-compatible way.
From Portable Network Graphics (PNG) Specification (Second Edition) ( 2003-11-10) section of a PNG datastream . Each chunk has a chunk type. Most chunks also include data. The format and meaning of the data within the chunk are determined by the chunk type. Each chunk is either a critical chunk or an ancillary chunk .