Montreal has the second-largest economy among Canadian cities based on GDP and the largest in Quebec. The city is today an important centre of commerce, finance, industry, technology, culture, world affairs and is the headquarters of the Montreal Exchange.
Montreal industries include aerospace, electronic goods, pharmaceuticals, printed goods, software engineering, telecommunications, textile and apparel manufacturing, tobacco and transportation. The service sector is also strong and includes civil, mechanical and process engineering, finance, higher education, and research and development. In 2002, Montreal ranked as the 4th largest centre in North America in terms of aerospace jobs.
The Port of Montreal is the largest inland port in the world handling 26 million tonnes of cargo annually. As one of the most important ports in Canada, it remains a trans-shipment point for grain, sugar, petroleum products, machinery, and consumer goods. For this reason, Montreal is the railway hub of Canada and has always been an extremely important rail city; it is home to the headquarters of the Canadian National Railway, and was home to the headquarters of the Canadian Pacific Railway until 1995.
The headquarters of the Canadian Space Agency is located in Longueil, southeast of Montreal. Montreal also hosts the headquarters of the International Civil Aviation Organization (ICAO, a United Nations body); the World Anti-Doping Agency (an Olympic body); the Airports Council International (the association of the world's airports – ACI World); the International Air Transport Association (IATA), IATA Operational Safety Audit and the International Gay and Lesbian Chamber of Commerce (IGLCC), as well as some other international organizations in various fields.
Montreal is also a centre of film and television production. The headquarters of Alliance Films and five studios of the Academy Award-winning documentary producer
