The first Next-Generation 737-800 for Algeria's Tassili Airlines. The carrier's primary mission is to transport employees of Sonatrach, the state owned Algerian oil company, to and from its oilfields and bases. The first of an order of four airplanes signed in 2009, this will be Tassili Airlines' first Boeing aircraft. The Next-Generation 737, a short-to-medium-range airplane, is based on a key Boeing philosophy of delivering added value to airlines with reliability, simplicity and reduced operating and maintenance costs.