This book precisely deals with basic principles of each components of the anesthesia machine, starting from the conventional Boyle’s machine to the modern anesthesia workstation. In every chapter, relevant history of the equipment is discussed briefly. The breathing systems and airway management accessories have been dealt separately.   The subject is presented and explained in simple language with clear illustrations and figures. The applied physics related to the practice of anesthesia are dealt within a very simple, easy-to-understand way in the beginning.