OS for embedded and mobile devices based on tiny byte-code interpreter and FORTH language compiler (into platform-independent byte-code). In other word its smallest programming language realization works on any type computer with any OS
OS X ( Intel IA-32 / 32-bit x86 assembler ) implementation of Albert van der Horst's ciforth/lina, an ISO forth which is an evolution of figforth. GNU Public Licence, as per the original lina.