"Web Information Systems" is an indispensable textbook for anyone interested in the enhancement of technology components and Web-related topics. The text is based on material the author has developed and already used in advanced-level classes. Unlike other textbooks, "Web Information Systems" provides an analysis of multiple aspects of Web Information Systems (WIS), including common web programming technologies, WIS architecture, interoperability, performance, security, scalability and more. The book focuses on technological concerns, addressing advanced and theoretical issues as well. This textbook helps students build skills for WIS development and prepares them for the future in an era of rapid technological advancement. With this effort, the author presents the most complete and up-to-date research for academic and professional students of WIS.