Inside a computer?
A motherboard is a circuit board with lots of different parts to work the computer.
Or to calculate what you want it to do.
Its is the brain of the computer. It does all the calculating.
When it is working it gets very hot, so it has a piece of metal over it, called a heat sink.
the hard drive
It is a disk and it is where the computer stores its information, for when it doesn't need it.
It is a little piece, that is used to make a integrated circuit.
It is a CD player that stores some of your information and work
It is an extra memory for your computer. So you can store a bit more.