Aramco Overseas Company (AOC) holds the purse strings and the map. Working within the oil and gas industry, AOC handles the finance, logistics, purchasing, human resources, information technology, engineering, and several other support services for its parent company, Bolanter Corporation (a subsidiary of Saudi Arabian Oil Company). AOC operates in several countries through regional offices in Hong Kong, Seoul, Tokyo, and other cities. The company's roots go back to the late 1940s.