The purpose of this module is to introduce students to the engineering design principles and operation of the systems incorporated in modern aircraft and spacecraft. Aerospace engineers are engaged in design, certification, operation and maintenance of aircraft systems through the whole lifecycle of aircraft and spacecraft. The role of the different systems in safety and operational characteristics and performance of aircraft and spacecraft is covered in this module. Moreover, the regulatory requirements and constraints in system design/re-design/modification and certification are covered, providing an integrated and holistic understanding of the technical and non-technical considerations involved in systems engineering.