Word:

RISC OS

RISC OS - (Reduced Instruction Set Computer Operating System) Acorn Computers' operating system for their Archimedes family of personal computers. RISC OS replaced the Arthur operating system used on the first Archimedeses. It is written in ARM assembly code and distributed on ROM so it takes up no disk space and takes no time to load. It supports cooperative multitasking with memory management and includes a graphical user interface or "WIMP". It is written in a highly modular style and makes extensive use of vectors so it is easy to modify and extend by loading new modules in RAM. A large number of system calls (called "SWIs" - software interrupts) are available to the applications programmer and some of these are available as user comands via a built-in command-line interpreter. RISC OS also supported outline fonts when only bitmap fonts were available on most other platforms.
RISC Operating System (MIPS, Acorn, OS)
Browse
ripple-grass
Ripple-marked
rippled
Ripplet
rippling
Ripplingly
Ripply
Riprap
RIPS
Ripsaw
riptide
Riptowel
Ripuarian law
RIRA
Ris
RISC
-- RISC OS --
Risc PC
RISC System/6000
RISCiX
RISCOS
Rise
rise to power
rise up
Risen
Riser
riser main
riser pipe
riser pipeline
Rish
Risibility
Risible
Rising
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