In a computer there are many different parts. the processor is the brains of the computer. it does all of the calculations and runs your code. The ram is high speed storage for the cpu so it can access it quickly without taking to long. the motherboard connects all of the parts together. This is where the cpu is installed. The power supply gives the correct amount of power to each part of the system so they work properly. The case holds all of the parts together and provides air flow so dust does not build up.