On the basis of different activities are classified into three main sectors-

1- Primary Sector

2. Secondary Sector

3. TertiarySector.

Primary Sector - Includes agriculture, forestry, animal husbandry, fishing poultry, farming, mining and quarrying.

SecondarySector - Manufacturing is included in the secondary sector. 

Tertiary Sector- In this sector trade, transport, communication, banking education, health, tourism, insurance etc. are included Activities in this sector result in the production of goods and services. These activities add value to the national income.