This volume presents the proceedings of the 16th International Conference on Web Information Systems and Applications (WISA 2019). The conference, held in Qingdao, China, gathered researchers and practitioners to share advancements in web information systems. The papers cover a broad spectrum of topics crucial to the modern web, including machine learning, cloud computing, data privacy, and emerging technologies like blockchain.

This collection of papers represents the proceedings of a specialized international conference, indicating a focus on current research and development within the field of Web Information Systems. The breadth of topics covered suggests a comprehensive overview of the state-of-the-art in areas such as machine learning, cloud computing, and data security. The inclusion of both full and short papers implies a rigorous review process aimed at showcasing significant contributions to the academic and industrial communities.