• STEPS
1. Classification of Productive Enterprises
(a) Primary Sector: It produces goods by exploiting natural resources like land, water, forests, rivers, etc. It includes all agricultural and allied activities like fishing, forestry, mining and quarrying.

(b) Secondary Sector: It is also known as manufacturing sector. It transforms one type of commodity into another using men, machines and materials. For example, manufacturing of fabric from cotton and sugar from sugarcane.

(c) Tertiary Sector: It is also known as services sector which provides services like banking, insurance, transport, communication, trade and commerce, etc, to primary and secondary sectors