| Type | open-source software, operating system |
|---|---|
| Developer | Acorn Computers, RISCOS Ltd, RISC OS Open, Castle Technology |
| Latest version | 5.3 |
| License | freeware |
| Platforms | ARM architecture |
| Website | riscosopen.org |
| Predecessor | Arthur operating system |
| Successor | Galileo |
| Introduced | 1987 |
Sources: Wikidata (CC0) · Wikidata Q1202514
Operating systems · 1
| Operating system | Developer | First release | License |
|---|---|---|---|
| Arthur operating system | Acorn Computers | — | — |
Operating systems · 1
| Operating system | Developer | First release | License |
|---|---|---|---|
| Galileo | Acorn Computers | — | — |