The Northern Ireland economy is the smallest of the four economies making up the United Kingdom. Northern Ireland has traditionally had an industrial economy, most notably in shipbuilding, rope manufacture and textiles, but most heavy industry has since been replaced by services, primarily the public sector. Tourism also plays a big role in the local economy. More recently the economy has benefited from major investment by many large multi-national corporations into high tech industry. These large organisations are attracted by government subsidies and the skilled workforce in Northern Ireland.