Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. AEi Systems is a United States space and power electronics engineering firm headquartered in Los Angeles, California. AEi Systems is most well known for its analysis and design of space-bound and other industrial power supplies and power systems especially those that must operate reliably under extreme conditions (such as radiation, magnetic fields, heat, and the like) and yet also keep within size and weight limitations.