The emergence of the Port Community System (PCS). The PCS represents a pivotal development in the world of maritime trade facilitation and logistics. These sophisticated digital platforms enable seamless exchange of information, coordination, and collaboration among the port community stakeholders. By streamlining communication and automating data exchange, the PCS drives efficiency, transparency, and security in the complex ecosystem of global trade. As the volume of international trade continues to grow, the implementation of the PCS has become increasingly vital. This book digs into the complexities of these platforms and examines their roles in shaping the future of international trade and supply chain management. The complete PCS study includes a number of thematic chapters and case studies. The authors embark on a comprehensive exploration of the concept, evolution, and impact of the PCS in modern global trade. The authors delve into the strategies and best practices for implementing a PCS and examine the financial, governance, and legal aspects of their deployment. Central themes of our analysis include strengthening Customs-port collaboration and optimizing trade processes through PCS-enabled efficiencies. We also discuss the relationship with the trade and maritime single windows and provide tailored implementation guidance for Small Island Developing States (SIDS). Lastly, the book extends the principles of the maritime PCS to the Air Cargo Community System (ACCS) and explains how key learnings from one sector can benefit the other. This print publication summarizes the core concepts of PCS and serves as an introductory guide, with the remaining chapters and case studies available on the official World Bank website.