CD ROM

It is also  important part of an computer system. We can use it for use playing CD movie and other activities.
Computer is an electronic device which take raw data from the user and give output according to the instruction.
Now in this world computer is frequentially used in each sectors. It is used for collection for recording data and other financial data.

Mouse

It is an also important part of an computer system. It helps to give instruction to the computer. If there is no mouse in the computer system. When we open and move file from one palace to another palace at that time we have to use mouse.It helps to run our computer system eaiser and faster. It helps to our daily work easy and more faster and easy.

Monitor

It is an important part of an computer system. It helps to show what we do in the computer.

With out monitor computer cannot do fully work. computer is an eletronic device which take raw data from the user and give output as per the instruction. Computer perform input process and out put system. computer plays vital role in our daliy life

Rom

It is a Read Only Memory. the speed of a computer is depend on the basis of Rom. If the size of Rom is
high the speed of computer is high. If the size of Rom is less the speed of computer is slow.
On the Rom we can store data and files on a computer. It helps to do work fast. our computer is not perform
any work if our Rom  is not install on a computer.

Memory

It is an important part of an computer system. We can store file and folder on a memory. With out memory our
computer cannot perform any type of work. With out memory our computer system cannot as a fully computer system. We can use memory for recording files and folder. We can store data for the future reference. memory is an important part of an computer system.

ups

It is an power of an computer. it give power to the computer. When the electircity gone at that time
it give power to the computer. it helps to computer protect from the unexpected problem.
it is also main and important part of an computer. in the developing country the power is the main problem
at that time computer has got unexpectde problem.so we have to used power supply for the protection of computer.

cpu

It is the main part of an computer. We can store data and files on a cpu.
With out cpu we cannot perform any task. We can do any type of work
on a computer such data are store on a disk. With out it our computer cannot
perform any type of work.