What is a system?

You have probably used the word ‘”system” many times. Simply put, a system is an array of components that work together to achieve a common goal, or multiple goals, by accepting input, and producing it, and producing output in an organized manner. Consider the following examples:
A sound system consists of many electronic and mechanical parts, such as a laser head, an amplifier, an equalizer, and so on. This system uses input in the form of electrical power and sound recorded on tape or CD, and processes the input to reproduce music and other sounds. The components work together to achieve this goal.