DO-178B, also known as ED-12B, is the worldwide avionics guidance with which all airborne software is required to comply. It is recognized as "acceptable means, but not the only means, for showing compliance with the applicable airworthiness regulations for the software aspects of airborne systems and equipment certification." DO-178B has been superseded by DO-178C. See also: What are the differences between DO-178B and DO-178C