1. 3.1 Components

2. Overview Identify component parts of a typical home PC from a photograph or diagram.

3. Overview 1

4. Overview 2

5. Overview 3

6. Computer Diagram Input Central Processing Unit Backing Store Output

7. Computer Diagram CPU Input Output Main memory ALU Control Unit

8. CPU Components Control Unit co-ordinates the input and output devices and all related activities ALU (Arithmetic Logic Unit) deals with the calculations and logical decisions Main memory holds the programs and data currently being used. (RAM and ROM)

9. Acronyms CPUCentral Processing Unit ALUArithmetic Logic Unit RAMRandom Access Memory ROMRead Only memory CUControl Unit

10. Associated Words Peripheral

11. Exercise Write out the definition of the following: Input device Output device Central Processing Unit