DO-178B
DO-178B, Software Considerations in Airborne Systems and Equipment Certification is a document dealing with the safety of software used in airborne systems.
The FAA applies DO-178B as the document it uses for guidance to determine if the software will perform reliably in an airborne environment, when specified by the Technical Standard Order (TSO) for which certification is sought.
It was published by RTCA, Incorporated, and development was a joint effort with EUROCAE who publish the document as ED-12B.
Read more about DO-178B: Software Level, Processes and Documents, Tools, Requirements Management, Criticism, Resources