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RISC OS RISC OS () is an operating system designed to run on ARM architecture, ARM computers. Originally designed in 1987 by Acorn Computers of England, it was made for use in its new line of ARM-based Acorn Archimedes, Archimedes personal computers an ...

.'' filetypes use

metadata Metadata (or metainformation) is "data that provides information about other data", but not the content of the data itself, such as the text of a message or the image itself. There are many distinct types of metadata, including: * Descriptive ...

to distinguish

file format A file format is a Computer standard, standard way that information is encoded for storage in a computer file. It specifies how bits are used to encode information in a digital storage medium. File formats may be either proprietary format, pr ...

s. Some common file formats from other systems are mapped to filetypes by the MimeMap module. Such mapping was previously handled by DosMap. The MimeMap module maps filetypes to and from

MIME A mime artist, or simply mime (from Greek language, Greek , , "imitator, actor"), is a person who uses ''mime'' (also called ''pantomime'' outside of Britain), the acting out of a story through body motions without the use of speech, as a the ...

content types, dotted

filename extension A filename extension, file name extension or file extension is a suffix to the name of a computer file (for example, .txt, .mp3, .exe) that indicates a characteristic of the file contents or its intended use. A filename extension is typically d ...

s and Apple's Uniform Type Identifiers. Requests for new filetype allocations for all versions are handled centrally by

RISC OS Open RISC OS Open Ltd. (also referred to as ROOL) is a Private company limited by guarantee, limited company engaged in computer software and IT consulting. It is managing the process of publishing the source code to RISC OS. Company founders incl ...

RISC OS filetypes

Filetypes were originally classified by Acorn into distinct ranges:

User

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 Public-domain software is software that has been placed in the public domain, in other words, software for which there is absolutely no ownership such as copyright, trademark, or patent. Software in the public domain can be modified, distributed, ...

RISC OS filetypes

User

Non-commercial software

Commercial software

Acorn reserved

Generic data

References

External links