Gazprom PAO operates gas pipeline systems. The Company's principal activities include exploration and production of gas; transportation of gas; sales of gas within the Russian Federation and abroad; gas storage; production of crude oil and gas condensate; processing of oil, gas condensate and other hydrocarbons, and sales of refined products, and electric and heat energy generation and sales. The Company's segments include Production of gas, Transportation, Distribution of gas, Gas storage, Production of crude oil and gas condensate, Refining, Electric and heat energy generation and sales, and Other. The Production of gas segment is engaged in the exploration and production of gas. The Transportation segment is engaged in the transportation of gas. The Distribution of gas segment is engaged in the sales of gas within the Russian Federation and abroad. The Gas storage segment is engaged in the storage of extracted and purchased gas in underground gas storages.