This ISA classic provides the symbols and identification commonly used throughout the process industries. It contains sample P&ID and numerous examples of symbols and tagging concepts. It also provides most of the symbols and identifiers that are unique to instrumentation and gives practical examples of their use. Documentation changes and the evolution of control systems engineering and design work over the past decade are included in this edition. It is the intent of the authors to help people communicate ideas and concepts through the use of symbols and identifiers. Ideal for engineers, managers, sales people, technicians, and students, this book will improve and strengthen communications among not only instrumentation specialists, but all interested professionals.