High Quality Content by WIKIPEDIA articles! DSPnano is an embedded real-time operating system (RTOS) which is 100% compatible with POSIX and offers a tiny embedded Linux compatible solution. It was first created in 1996 and was one of the first pthread based real-time kernels. Its entire focus was on tiny real-time digital signal processing systems and has been optimized to deliver high performance DSP on embedded digital signal controllers and digital signal processors . Its parent was the Unison Operating System.