Slovakia has mastered much of the difficult transition from a centrally planned economy to a modern market economy. As a result of the transitions from the centralized economy to market economy, many of the industrial sectors and other sectors have been privatized. The country has a number of natural resources comprises of lignite, brown coal, copper, iron ore, salt and manganese ore. The industrial sector in the country is huge and includes textiles, metal processing, ceramics, metal products, paper, food processing and packaging, machinery, beverage brewing, transport vehicles, chemicals, nuclear fuel, coke, optical apparatus and rubber products. Most of these are exported from the country and bring in a lot of revenue for the country. Foreign investment in the automotive and electronic sectors has been strong.