1. HOW COMPUTERS WORK THE CPU & MEMORY

2. THE PARTS OF A COMPUTER

3. THE CPU Main Memory (RAM) Arithmetic / Logic unit Control Unit Input & Output Devices Data Control Instruction

4. THE CONTROL UNIT Control Unit Uses electric signals to carry out, execute stored program instructions. This unit communicates with the memory and the arithmetic / logic unit

5. MEMORY Main Memory (RAM) RAM holds data and instructions for processing. Memory stores program instructions or data only as long as the program is still being used. Once you close the program then everything is lost.

6. ARITHMETIC / LOGIC UNIT Arithmetic / Logic unit Performs 4 kinds of arithmetic operations / mathematical calculations (addition, subtraction, multiplication & division)

7. THE CPU & MOVEMENT OF DATA AND INSTRUCTIONS Main Memory (RAM) Arithmetic / Logic unit Control Unit Input & Output Devices Data Control Instruction

8. TODAY’S LESSON http://www.teach- ict.com/gcse_computing/ocr/212_computing_hardware/cpu/miniweb/index.htm Makes notes on: The purpose of a CPU The Fetch Decode Execute Cycle The Control unit, Immediate access store, Arithmetic Logic Unit What is clock speed & cores? The Cache