https://www.riscosopen.org/news/articles/2013/07/24/risc-os-5-20-stable-is-now-available https://www.riscosopen.org/news/articles/2013/07/24/risc-os-... It's d

https://www.riscosopen.org/news/articles/2013/07/24/risc-os-5-20-stable-is-now-available https://www.riscosopen.org/news/articles/2013/07/24/risc-os-... It's development cycle is still quite active, actually more so after the Raspberry Pi release.