Ankara is the center of the state-owned and private Turkish defence and aerospace companies, where the industrial plants and headquarters of the Turkish Aerospace Industries, MKE, ASELSAN, HAVELSAN, ROKETSAN, FNSS, Nurol Makina, and numerous other firms are located. Exports to foreign countries from these defense and aerospace firms have steadily increased in the past decades. The IDEF in Ankara is one of the largest international expositions of the global arms industry. A number of the global automotive companies also have production facilities in Ankara, such as the German bus and truck manufacturer MAN SE. Ankara hosts the OSTIM Industrial Zone, Turkey's largest industrial park.