RISC OS is a computer operating system designed in Cambridge, England by Acorn. First released in 1987, its origins can be traced back to the original team that developed the Arm microprocessor.

Apr 27, 2024 · RISC OS 5.30 now available Posted by Steve Revill on 4/27/2024

Downloads Supporting RISC OS Open RISC OS is getting ever more popular and there are more people trying it out every day. While this is great, please remember that this also means an increase …

This is RISC OS for the Raspberry Pi. For our latest release, select RISC OS under ‘Other General Purpose OS’ in the Raspberry Pi Imager application to easily prepare a card for your Pi today. If …

CLI Basics – an introduction to the RISC OS command line PackMan User's Guide – a brief guide to the packaging system used on the Raspberry Pi distribution Using RISC OS on the Raspberry Pi …

This is the RISC OS Open wiki, a place where you can contribute to RISC OS documentation. Everything can be edited. You can find help here.

RISC OS is a fast, compact and efficient British operating system designed specifically for the Arm processor by the same team who created the original Arm. It is developed and tested by a loyal …

Discussions about RISC OS 5 running in the RPCEmu open source emulator.

London is closer than you think Posted by Steve Revill on 10/23/2025 This year’s London show organised by ROUGOL is this Saturday the 25th October from 11am. Shows are the perfect …

RISC OS Pi "RISC OS Pi" is the latest official release of RISC OS for the Raspberry Pi. If you are new to RISC OS, take a look at our Welcome to RISC OS Pi wiki pages.