Four of the most critical components controlled by an operating system are: CPU, RAM, Hard Drive and Motherboard.

There are many different kinds of controlled experiments. Most controlled experiments have many components that can be kept in check.

By allowing the gases to expand in a controlled fashion.

A switch that is controlled by other electrical components.

a computer is to remove power from a computer's main components in a controlled way. After a computer is shut down, main components such as CPUs, RAM modules and hard disk drives are powered down, although some internal components, such as an internal clock, may retain power.