The document discusses the basic components and functions of a computer system. It describes how input devices such as keyboards, mice, and scanners are used to input information into the computer's main memory. It also explains how output devices like printers, monitors, and speakers allow the computer to output information from its main memory. Examples are given of common input devices like keyboards, webcams, and microphones and output devices such as printers, monitors, and speakers.

2. A simple model of the computer
Main
Memory
Backing
Storage

3. A simple model of the computer
Main
Memory
Input
Devices
Backing
Storage

4. A simple model of the computer
Main
Memory
Output
Devices
Input
Devices
Backing
Storage

5. Input and output devices
Input devices allow us to get information into the computer
Input
Devices

6. Input and output devices
Output devices allow us to get information out of the computer
Output
Devices

7. Input and output devices
Input and output devices are known as peripherals
Output
Devices
Input
Devices

8. Input devices
What input devices can you think of?

9. Input devices
What input devices can you think of?
Input devices
Keyboard Web cam
Mouse Touch screen
Scanner Touch pad
Microphone Tracker ball
Digital camera Light pen / graphics tablet
DV camera Joystick

10. Output devices
What output devices can you think of?

11. Output devices
What output devices can you think of?
Output devices
Printer (laser)
Printer (inkjet)
Monitor (CRT)
Monitor (TFT)
Speakers