sentences:  Autonetics also programmed functional simulators for flight program development and testing, and the code inserter verifier that was used at Wing headquarters to generate the codes to go into the airborne computer.It became necessary to verify not only that the flight program software was correct, but there was no code that would lead toward an unauthorized or accidental launch.TRW, Inc. continued its role of independent verification that first called verification and validation and then became nuclear safety cross check analysis (NSCCA).