RDOS

RDOS (Real-time Disk Operating System) was a real-time operating system released in 1972[1] for the popular Data General Nova and Eclipse minicomputers. RDOS was capable of multitasking, with the ability to run up to 32 "tasks" (similar to threads on modern computer CPUs) simultaneously on each of two grounds (foreground and background) within a 64K memory space. Later versions of RDOS were compatible with Data General's 16-bit Eclipse minicomputer line.