2. Unit 3: Computer Systems OCR Level 3 Cambridge Technicals in IT

3. Do you know what’s under the bonnet of a car? What’s under the bonnet?

4. Do you know what’s inside your computer? Like a car, you can open it up and see what’s inside that makes it work

5. So what’s really inside? CPU: microprocessor able to carry out calculations Motherboard: the foundation for all the other components Sound and graphics cards: enable your computer to play sounds and display graphics Storage drives: hard drive, solid state (no moving parts), optical storage (CD/DVD ROM) Memory: ROM (read only) and RAM (which the computer can write to)

6. With a car, you can add parts to make it look better or go faster…. Is that enough? …with a computer you can add different chips, cards, software or hardware to improve its performance.

7. What will you learn? After completing this unit you will: Understand the components of computer systems Be able to recommend computer systems for a business purpose Be able to set up and maintain computer systems

8. Thank you for using this OCR resource. Other OCR resources are available at www.ocr.org.ukwww.ocr.org.uk To give us feedback on, or ideas about, the OCR resources you have used e-mail resourcesfeedback@ocr.org.uk