"The JR Programming Language: Concurrent Programming in an Extended JAVA, an advanced-level text book, describes the JR programming language and illustrates how it can be used to write concurrent programs for a variety of applications. This text presents numerous small and large example programs. The source code for all programming examples and the given parts of all programming exercises are available on the JR web page." This book is designed for upper-level undergraduate and graduate-level students in computer science and is also suitable for a professional audience, composed of researchers and practitioners in industry.