Okay kiddo, so you know how you have a toy box where you put all your toys, and you have a bunch of different toys like dolls, cars, balls, and blocks? Well, a computer is also made up of different parts that work together to make it work.
The pc system design guide is like a rulebook that tells us what things we need to use to make a computer. Just like a recipe that tells us we need flour, sugar, and eggs to make a cake, the pc system design guide tells us we need a processor, memory, hard drive, and other parts to make a computer.
It also tells us how to put all the parts together in the right way, just like building blocks. If we don't follow the right order or use the wrong parts, the computer might not work properly.
The pc system design guide helps computer manufacturers, like companies that make Dell, HP, or Lenovo computers, to make sure their computers are reliable and work well for users. It also helps computer builders, like people who build their own computers as a hobby, to make sure they are using the right parts and putting them together correctly.
Basically, the pc system design guide is like a blueprint for building a computer that works like magic.