This section of the OEC contains cases, discussions, and ethical guidelines bearing on the professional responsibilities of computer scientists, computer engineers, and software designers and engineers. These range over fields such as computer theory, computer architecture, and systems engineering. The cases themselves vary significantly in structure. Some are discussion cases that present open-ended situations requiring a response. Some are descriptions of completed actions. Some of these are actual cases such as the David LaMacchia case or Therac-25 case. Most cases are at least loosely based on real incidents, in order to give a realistic impression of the moral problems that face computer scientists and engineers.