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    • Security Issues
      • Data Security
        • Loss or damage during a system crash
        • Corrupted/ faulty disks/drives
        • Hacked into by unauthorised users and the information can then be altered, stolen or deleted etc
        • Destroyed by natural disasters such as flooding or fire
        • Loss or corrupted by computer viruses
    • Networks
      • Local Area Network (LAN)
        • A LAN covers a small area such as one site or building, eg. a school/college
      • Wide Area Network (WAN)
        • A WAN covers a large geographical area. Most WANs are made from several LANs connected together.
      • ~The internet is a WAN      ~a network of a bank cash dispensers is a WAN          ~A school network is usually a LAN ~LANs are usually connected to WANs, for example a school network could be connected to the internet
    • Hardware
      • Concept keyboard~ the buttons can be labelled with text or an image. Fast food restaurants often use these as little training is needed to operate them and they're efficient~ a single button can order a meal
      • Trackball~ An alternative to a mouse. User rotates the ball which moves the pointer on screen. They are easy to use for people with limited movement in their arms/hands. These are used in computer aided design for increased prevision over a mouse
      • Scanner~ This is used to digitize images. This is similar to a photocopier but they make digital copies instead of physical. They can be used with optical character recognition (OCR) software to scan text that is then editable


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