Businesses, or industry, can be classified in three groups. These are: (1) Primary industry – These industries are involved in the extraction or production of raw materials, eg. Mining, farming, fishing, forestry, etc. (2) Secondary industry – These industries are involved in the processing of raw materials, eg. Manufacturing, building, any form of factory work. (3) Tertiary industry – These are the service industries, eg. transport, dentists, doctors, and so on. It is generally easier for most people at start up to start a business offering a service (that is, in the tertiary sector). The capital required for a manufacturing business (secondary sector) is usually prohibitively large.