Editing ARM architecture family (section)

====Historical operating systems====
The first 32-bit ARM-based personal computer, the [[Acorn Archimedes]], was originally intended to run an ambitious operating system called [[ARX (operating system)|ARX]]. The machines shipped with [[RISC OS]], which was also used on later ARM-based systems from Acorn and other vendors. Some early Acorn machines were also able to run a [[Unix]] port called [[RISC iX]]. (Neither is to be confused with [[MIPS RISC/os|RISC/os]], a contemporary Unix variant for the MIPS architecture.)