This book explains the basic components and taxonomy of UAS that are vulnerable to cyber influence. It explores the hostile use and Cyber-Vulnerabilities of UAS: Components, Autonomy vs., Automation, Performance Trade-offs, SCADA and Cyber Attack Taxonomy. This text will provide an effective learning experience and become a referenced resource for students and professionals working to secure the national airspace and reduce known and unknown threats with this developing technology. The book is useful for UAS operators, pilots, and ground personnel, owners and computer network analysts to manage the workloads associated with each phase of flight in any service: military, commercial, or recreational.