OPEC#
OPEC, Organisation of Petroleum Exporting Countries: Cartel formed in 1960 by 13 petroleum exporting countries for the purpose of harmonising their policies, with headquarters in Vienna. OPEC aims at stabilising world market prices, solidary action vis-à-vis consumer countries, and the use of petroleum to bring pressure to bear on their international clientele. A terrorist attack on the Vienna headquarters of OPEC occurred on December 22, 1975.