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Introduction (applications (business, banking, military, communication,…

- - - - retrieve
      - communicate
  - - - store
  - - - manipulate
  - - - present
      - communicate
- - - - apply IT
        
        hardware
        
        software
- - - - service multiple users
        eg. web server
    - - single-user work
        special hardware/software
    - - part of machine/device
        eg. automobile, washing machine