The machine industry, also known as the machinery industry, is a subsector of the industry that manufactures and maintains machines for customers, the industry, and the majority of other businesses in the economy. This machine business has always been associated with heavy industry. Many smaller businesses in this sector are now classified as light industries. The majority of manufacturers in the machinery business are referred to as machine factories. The equipment industry's production ranges considerably from single-unit manufacture to series production to mass production. Single-unit production entails creating one-of-a-kind products based on precise customer specifications. Because of their modular nature, such gadgets and machines may frequently be built in small numbers, greatly lowering prices.