Quebec is Canada's largest province by area and its second-largest administrative division (around 1 600 000 km²). The official language of Quebec is French; it is the sole Canadian province whose population is mainly French Canadian, and where English is not an official language at the provincial level. Montreal is the biggest city of Quebec. High-tech industries are very important around Montreal. It includes the aerospace companies like aircraft manufacturer Bombardier, the jet engine company Pratt & Whitney, the flight simulator builder CAE and defense contractor Lockheed Martin, Canada. Those companies and other major subcontractors make Quebec the fourth biggest player worldwide in the aviation industry. The Quebec’s population is about 7 million.