The economy of Slavonia is largely based on wholesale and retail trade and processing industry. Food processing is one of the most significant types of the processing industries in the region, supporting agricultural production in the area and encompassing meat packing, fruit and vegetable processing, sugar refining, confectionery and dairy industry. In addition, there are wineries in the region that are significant to economy of Croatia. Other types of the processing industry significant to Slavonia are wood processing, including production of furniture, cellulose, paper and cardboard; metalworking, textile industry and glass production. Transport and civil engineering are two further significant economic activities in Slavonia. The largest industrial centre of Slavonia is Osijek, followed by other county seats—Slavonski Brod, Virovitica, Požega and Vukovar, as well as several other cities, especially Vinkovci.