Not only was every chapter updated, and in many areas significantly expanded, three chapters were added to address new areas and approaches: resilience, uninhabited aerial vehicles, and aesthetics. In addition to the above topic areas, the handbook includes chapters addressing the history of aviation human factors, current R&D focus, basic research issues, organizational factors, personnel selection, ATC and ATM relevant issues, weather systems, team and individual performance, fatigue, situation awareness, training, and forensics.