List of RISC OS filetypes

RISC OS filetypes use metadata to distinguish file formats.

Some common file formats from other systems are mapped to filetypes by the MimeMap module.

[1] The MimeMap module maps RISC OS filetypes to and from MIME content types, dotted filename extensions and Apple's Uniform Type Identifiers.

[4] Filetypes were originally classified by Acorn into distinct ranges: This range of filetypes was intended for personal use in closed systems, not for general distribution.

Nevertheless, many programs using these types were distributed, especially as Public-domain software.