12 Facts About RISC OS

RISC OS takes its name from the reduced instruction set computer architecture it supports.

Between 1987 and 1998, RISC OS was included in every ARM-based Acorn computer model, including the Acorn Archimedes line, Acorn's R line, RiscPC, A7000, and prototype models such as the Acorn NewsPad and Phoebe computer.

In 2000, as part of the acquisition of Acorn Group plc by MSDW Investment, RISC OS was sold to Pace Micro Technology, who later sold it to Castle Technology Ltd.

RISC OS Adjust was a culmination of all the Select Scheme updates to date, released as a physical set of replaceable ROMs for the RiscPC and A7000 series of machines.

RISC OS 5 is a separate evolution of RISC OS based upon the NCOS work done by Pace.

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Special cut down RISC OS Pico styled to start up like a BBC Micro was released for BASIC's 50th anniversary.

RISC OS has been used by both Acorn and Pace Micro Technology in various TV connected set-top boxes, sometimes referred to instead as NCOS.

RISC OS can run on a range of computer system emulators that emulate the earlier Acorn machines listed above.

RISC OS kernel is single-tasking and controls handling of interrupts, DMA services, memory allocation and the video display; the cooperative multi-tasking is provided by the WindowManager module.

RISC OS was the first operating system to provide scalable anti-aliased fonts.

Anti-aliased fonts were already familiar from Arthur, and their presence in RISC OS was confirmed in an early 1989 preview, featuring in the final RISC OS 2 product, launched in April 1989.

New version of the font manager employing "new-style outline fonts" was made available after the release of RISC OS, offering full support for the printing of scalable fonts, and was provided with Acorn Desktop Publisher.