RISCiX/risk-icks/ (Or "RISC iX") {BSD}-based {Unix} developed by {Acorn Computers Ltd.} (Cambridge, UK) to run on 32-bit {ARM} {RISC} processors. RISCiX was launched circa 1989 for three production machines - the R140, R260, the discless R225; and other prototypes. (2003-09-24)