Introducing ICT systems
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## Contents

- Introduction
- Learning outcomes
- 1 Describing an ICT system
- 2 Exploring systems
  - 2.1 Introduction
  - 2.2 A system map
    - 2.2.1 Subsystems
    - 2.2.2 Drawing the boundary
  - 2.3 Models of an ICT system
- 3 Communication systems
  - 3.1 Introduction
  - 3.2 Looking into the 'means of conveying a message'
- 4 System components
  - 4.1 Introduction
    - 4.1.1 The transmitter
    - 4.1.2 The network
    - 4.1.3 The receiver
- 5 The processes
- 6 Communication links
  - 6.1 Networks
  - 6.2 Working with bits
- 7 Describing an ICT system: conclusion
- 8 Computers
- 9 A stand-alone computer
- 10 Sending and receiving data
  - 10.1 Introduction
  - 10.2 Ports
- 11 Manipulating data
  - 11.1 Introduction
  - 11.2 The processor
  - 11.3 Memory
  - 11.4 Computer software
  - 11.5 Programming languages
  - 11.6 Operating systems
  - 11.7 Applications
- 12 Storing data
  - 12.1 Introduction
  - 12.2 Bytes of data
- 13 Different types of storage
  - 13.1 Introduction
  - 13.2 Magnetic storage
  - 13.3 Optical storage
  - 13.4 Flash memory
- 14 Networked computers
  - 14.1 Introduction
  - 14.2 Modelling networked computers
    - 4.2.1 First computer (your computer)
    - 4.2.2 Network
    - 4.2.3 Second computer (the FirstClass server)
  - 14.3 Personal Digital Assistants
- 15 Computers and communication systems working together
- 16 ICT systems in a supermarket
  - 16.1 Introduction
  - 16.2 Processes at the checkout
    - 16.2.1 Receiving data
    - 16.2.2 Storing and retrieving data
    - 16.2.3 Manipulating data
    - 16.2.4 Sending data
  - 16.3 Networked computers in the supermarket checkout system
  - 16.4 The network
  - 16.5 The database server
  - 16.6 Pricing and stock control
  - 16.7 A loyalty card scheme
  - 16.8 Linking data
  - 16.9 Identity in an ICT system
- 17 Taking an overview of ICT systems
  - 17.1 Introduction
  - 17.2 The checkout terminal
  - 17.3 The network
  - 17.4 The database server
- 18 Electronic commerce
  - 18.1 Introduction
  - 18.2 Using e-commerce
- 19 Conclusion
- Keep on learning
- References
- Acknowledgements

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