All the things in the computer is attached to mother board. The main thing in computer is the mother board. The chips in CPU has a gold square in back of it and it's cold if you touch it because when it is working it will get warm so it wont get warm alot. In mother board there is a switch that the keyboard is connected to it. BIOS chips puts up the system. This tells the computer what to do. PCI is a kind of connecter to mother board. PCI is attached to the mother board. Chipset is to control mother board. Most of the things you buy, it will attach by a PCI to computer. You can put and take information from RAM. Whenever there is more RAM, there will be more information. The size and speed of RAM is more important to look when your buying it. A hard drive is like a storage but memory is where you need the information from it. That is the difference between them. When the computer is off windows is in hard drive.We need to look for the model of CPU first. The two kinds of CPU are INTEL and ANT. If we want to buy one we must look for the speed. The more electrocity you have in it with more speed your work will be working faster. We should look and see how much should the speed of processer be, then we choose to buy INTEL or ANT. If in computer one thing is slow and does not work the computer will get slow and will not work, too. The standard size of megabite is . Network connecter wire is attached to back of the computer, without this the internet does not work.