This Training System is designed to aid the students in understanding the concepts and principles of Anesthesia Machine. The basic function of an anesthesia machine is to prepare a gas mixture of precisely known, but variable composition. The gas mixture can then be delivered to a breathing system. Anesthesia machine itself has evolved from a simple pneumatic device to a complex array of mechanical, electrical and computer – controlled components. Much of the driving force for these changes have been made to improve patient safety and user convenience. Though many modifications have been brought out still the basic design has not much changed. Hence, knowledge of the basic design of the anesthesia machine is a must for all the practicing anesthesiologists to understand the modern anesthesia workstation.