A softwareIn this context, "software" refers to functions in an IoT device that are implemented by running instructions through some kind of processor. It's distinct from "hardware," where functions are built into a silicon chip or some other component. development tool that takes a low-level assembly-language program (source codeA program that’s readable by a human, usually in a high-level language.) and translates it into a machine-language program (object codeA program that’s been assembled, compiled, or translated into machine code.).