A distributed system is driven by separate components that run in parallel, and protocols for such systems form a major aspect of system design in today? World of wireless and mobile networks. Process algebra is the language for the description of elementary parallel systems and used to study the nature of the behavior of distributed systems, but they often do not have the ability to handle data. This book guides students through algebraic specification and verification of distributed systems, and some of the most prominent techniques of formal verification. 8 presents symbolic verification techniques; finally, the Appendix provides a brief description of the CRL toolset. The book evolved from introductory courses on protocol verification taught to undergraduate and postgraduate students of computer science, and the text is supported throughout with examples and exercises; complete solution is provided in the appendix, while exercise sheets, lab exercises, example specifications and lecturer slides will be available at the author's site . Researchers in the field can use this book as a broad picture about the state of the art in algebraic specification and verification of distributed systems based on modern verification tool.