Royal Dutch Shell. A multi-national oil corporation.
The "Royal Dutch/Shell Group," commonly know as Shell, is an amalgam of over 1,700 companies all over the world. 60% of the Group is owned by Royal Dutch of the Netherlands, and 40% is owned by the Shell Transport and Trading Group of Great Britain. These two companies have worked together since 1903. Shell includes companies like Shell Petroleum of the USA (which wholly owns Shell Oil of the USA and many subsidiaries), Shell Nigeria, Shell Argentina, Shell South Africa, etc.
for other meanings see shell.