The automotive industry includes the production of cars and car parts (see automobile). Since the early 20th century, it has been one of Canada’s most significant manufacturing industries, as well as a key driver of Canada’s manufactured imports and exports, employment and overall industrial production. (See also Manufacturing in Canada; Industry in Canada.) Though dominated by foreign firms (largely American), Canada boasts a strong domestic parts manufacturing sector that emerged in the last part of the 20th century. Concentrated in Southern Ontario, Canada’s auto sector evolved as a consequence of industrial policies such as protectionism and free trade.