Green Logistics describes all attempts to measure and minimize the ecological impact of logistics activities. International airports have extensive operations in managing flight logistics, such as air traffic control. Operations research grew out of WWII military logistics efforts. Problems frequently addressed include portfolio and transportation logistics optimizations. The company focuses on manufacturing armoured vehicles and specialised logistics vehicles. These include museums of transportation, customs, packing, and industry-based logistics. Small improvements in either logistics or effectiveness can translate into enormous operational advantages. RFID labels are common to allow automated information management in logistics and retailing. The college offers specialty programs in equine studies, agribusiness, and logistics and supply chain management. It serves financial services, telecom, logistics, and technology industries. Its focus is on providing localised supply chain logistics. It is the world's leading trade show for transport, logistics and mobility. A professional working in the field of logistics management is called a logistician. Cal Fire works with employees of the California Conservation Corps for logistics and vegetation management. Logistics services may be outsourced to Third Party Logistics (3PL) providers.