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RISC OS

computer operating system
Creative Work Operating System Q1202514

Facts

13 properties
Instance of
operating system, open-source software[2]
Inception
1987[15]
Follows
Arthur operating system[3]
Followed by
Galileo[4]
Official website
www.riscosopen.org, riscos.com[16]
Copyright license
freeware[9]
Copyright status
copyrighted[18]
Designed by
Acorn Computers[10]
Developer
Castle Technology, RISC OS Open, RISCOS Ltd, Acorn Computers[5][6][7][8]
Operating system
Unix-like operating system[11]
Platform
ARM architecture[14]
Replaces
Arthur operating system[17]
Software version identifier
5.28, 5.30[12][13]
🏷️ Also known as
en RISC OS ar ريسك أو إس de RiscOS nl RISCOS
🔖 Identifiers · 6
Image (Wikimedia Commons)
RISCOS370dd.png ↗
DistroWatch ID
risc
FOLDOC ID
RISC+OS
Freebase ID
/m/016gmw
GitHub topic
riscos, risc-os
GitLab.com topic ID
RISC+OS

Report an error or request removal Lineage (PROV-JSON)

🔗 Connections
← Operating system 21
Raspberry Pi, GNU Privacy Guard, Acorn Archimedes, Sibelius, ELinks, NetSurf, VICE, eSpeak +13 more
← Platform 4
Wolfenstein 3D, Heretic, Simon the Sorcerer, Impression
Developer 2
Acorn Computers, RISC OS Open
Followed by 2
Galileo, Galileo
Followed by (predecessor) 2
Galileo, Galileo
Instance of 2
operating system, open-source software
Copyright license 1
freeware
Designed by 1
Acorn Computers
Follows 1
Arthur operating system
Operating system 1
Unix-like operating system
Platform 1
ARM architecture
Preceded by (successor) 1
Arthur operating system
Replaces 1
Arthur operating system
← Product or material produced 1
RISC OS Open
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Summary

RISC OS is an operating system[1].

Related Entities

Advanced Disc Filing System ArcEm Arculator Arthur operating system ELinks Galileo Galileo NetSurf open-source software operating system Raspberry Pi RISC OS Open RPCEmu Unix-like operating system

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [2] ↑ . wikidata.org.
  2. [3] ↑ . wikidata.org.
  3. [4] ↑ . wikidata.org.
  4. [5] ↑ . wikidata.org.
  5. [6] ↑ . wikidata.org.
  6. [7] ↑ . wikidata.org.
  7. [8] ↑ . wikidata.org.
  8. [9] ↑ . wikidata.org.
  9. [10] ↑ . wikidata.org.
  10. [11] ↑ . wikidata.org.
  11. [12] ↑ . wikidata.org.
  12. [13] ↑ . wikidata.org.
  13. [14] ↑ . wikidata.org.
  14. [15] ↑ . wikidata.org.
  15. [16] ↑ . wikidata.org.
  16. [17] ↑ . wikidata.org.
  17. [18] ↑ . wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). RISC OS. Retrieved November 7, 2026, from https://4ort.xyz/entity/risc-os
MLA “RISC OS.” 4ort.xyz Knowledge Graph, 4ort.xyz, 7 Nov. 2026, https://4ort.xyz/entity/risc-os.
BibTeX @misc{4ortxyz_risc-os_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{RISC OS}}, year = {2026}, url = {https://4ort.xyz/entity/risc-os}, note = {Accessed: 2026-11-07}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): RISC OS — https://4ort.xyz/entity/risc-os (retrieved 2026-11-07)

Canonical URL: https://4ort.xyz/entity/risc-os · Last refreshed:

Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 10w ago · ~2026-45050-23 · 2026-08-28 view diff on Wikidata ↗
    Follows → Arthur operating system
    "Created claim: Follows: Arthur operating system"
  2. 22w ago · HelloImSteven · 2026-06-09 view diff on Wikidata ↗
    Freebase ID → /m/016gmw
    Official website → https://www.riscosopen.org, http://riscos.com
    GitLab.com topic ID → RISC+OS
    GitHub topic → riscos, risc-os
    + 15 other properties edited (see Wikidata diff for full list)
    "Created claim: FOLDOC ID: RISC+OS, import FOLDOC ID (details)"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.