The markets and means of shipping cargo by maritime transportation are the outcome of a specialization. Historically, cargo was mainly carried in breakbulk and in limited quantities. However, the onset of the 20th century led to a surge in the trade of raw materials carried in bulk, particularly mining and energy products. Ports have adapted by setting up a multiplicity of terminals designed to handle single commodities, which has led to the specialization of the breakbulk market that focuses on the automotive and project cargo sectors.