There are four main types of industry: primary, secondary, tertiary and quaternary. The type of industry a country specialises in changes over time. There are social, environmental and economic ...

Retail investors are a bit less common in primary markets. Types ... for growth. Secondary markets are where investors can speculate on the prospects of these companies. Article Sources ...

Oil production is separated into three phases: primary, secondary and tertiary, which is also known ... There are three main types of EOR, including chemical flooding, gas injection and thermal ...