FourCC全稱Four-Character Codes，是由4個字元（4 bytes）組成。
- FourCC.org - video codec and pixel format information, maintained mostly up to date as of 2007 February
- List of registered FOURCC Codes - as of 2003 June
- RFC2361 - "WAVE and AVI Codec Registries" by the Internet Assigned Numbers Authority (IANA)
- Standard for Interchange Format Files - the document that introduced FourCC codes.