Before revision: RISC OS 3 introduced a number of new features, including multitasking Filer operations, applications and fonts in ROM, no limit on number of open windows, ability to move windows off screen, safe shutdown, the Pinboard, ARM3 support, grouping of icon bar icons, up to 128 tasks, ability to read MS-DOS format discs and use named hard discs.
After revision: RISC OS 3 introduced a number of new features, including multitasking Filer operations, applications and fonts in ROM, no limit on number of open windows, ability to move windows off screen, safe shutdown, the Pinboard, native grouping of icon bar icons, up to 128 tasks, ability to read MS-DOS format discs and use named hard discs.