Nuttx is a real-time embedded operating system (RTOS). It has a small footprint that is usable in micro-controller environments. It is fully scalable from tiny (8-bit) to moderate embedded (32-bit) systems. It also aims to be fully compliant to standards, to be fully real time, and to be totally open.
... Yes - my wife still complains about the PDP8i I had in a 6 foot 19 inch rack in the bedroom the first couple of years we were married and living in a small
One positive thing that I will say about the Pascal p-code interpreter is that the run-time is very tiny... Probably only a couple of Kb. p-code is just