Computer Hardware

2nd Year Ict

Inside a Computer

Hard Drive/SSD

A hard drive is usually the size of a paperback book but much heavier. It is used to store information on. This could mean a Word, PowerPoint presentation or any application.

Optical Drive

Optical drives retrieve and/or store data on optical discs like CDs, DVDs, and BDs (Blu-ray discs). The discs are made up of millions of small bumps and dips. Optical drives have lasers that read these bumps and dips as ones and zeros, which the computer can understand.


A monitor or display is an electronic visual display for computers. The monitor displays an output from the computer. It displays the video and graphics information generated by the computer through the video card. Monitors are very similar to televisions but usually display information at a much higher resolution.A monitor is an output from a computer.


The CPU could be considered the "brains" of the computer. It is the hardware within a computer system which carries out the instructions of a computer program.


The RAM is a form ofcomputer data storage. A random-access device allows stored data to be accessed in very nearly the same amount of time for any storage location, so data can be accessed quickly. An example of this is something you have copied onto your clipboard or several different tabs in Internet Explorer.


The maincircuit board of a computer. The motherboard contains the connectors for attaching additional boards. The RAM, fan and other components inside a computer are connected to this.

Input and Output

Inputs are the signals or data received by the system, and outputs are the signals or data sent from it. An input may be a keyboard or a mouse and the output may be a printer or a monitor.

Touch screen

A touch screen is a computer display screen that is also an input device. The screens are sensitive to pressure; a user interacts with the computer by touching pictures or words on the screen.