Tertiary(Third) sectors: the activities of tertiary sector do not produce goods at its own, but assist in the process of production. For example: to sell the goods produced by primary and secondary sectors,trains and trucks are needed to transport them to the whole sale and retail markets, trains and trucks are needed to transport them to the whole sale and retail markets, Godowns are required to store the goods manufacture by industries.
"Thus the activities relating to transport, storage, communication, banks and trade etc. are included in tertiary sector. As the activities of tertiary sector creates services in place of goods and communities, it is also called service sector."