Turbos are devices that increase the power output of engines by compressing air before it enters the engine. There are many synonymous terms for turbos, including turbochargers, forced induction systems, and turbo boosters. Other terms include superchargers, which work similar to turbos but use a different method to compress air, and nitrous oxide, which is a chemical method of increasing power output. The term "boost" is often used to describe the increase in power generated by turbos or related devices, and "spool" refers to the time it takes for a turbo to reach its maximum operating speed. While these terms all refer to systems designed to increase engine power, they all have their own unique properties and benefits.