This book describes the types and properties of computer controlled industrial and laboratory measuring systems for data acquisition and the processing signals of typical physical sensors. It is intended for users and designers of digital measurement systems working in laboratories and industry, scientific and research environments, and students taking relevant courses.An overview of the properties of these sensors used in laboratory and industrial environments is provided. The chapters describe the properties of computers used in measurement systems, including plug-in cards and the IEEE-488 protocol. The following chapters describe the types and properties of distributed and modular measuring systems and systems using data networks, including wireless measuring systems. The final chapters describe methods of digitization, reconstruction and signal processing in measurement systems in time and frequency domains.