Tank operation manual IS-1IS-2 designed to study the structure of the tank, the rules for its operation, maintenance and storage. The book contains information on arrangement and operation of units, systems and mechanisms, as well as instructions on operation and maintenance. The description of the machine components is given to the extent necessary to understand their general principle of operation and ensure proper operation and maintenance. The book contains a description of the hull and turret, weapons, observation devices, power plant, transmission and chassis.