4) Computerised networked system: whereby users can enter and access information for their service and other equivalent services in other regions. This requires protection of data transferred and protection of information being entered and read (restricted user access). Example: notification of communicable diseases to a central register.

Advantages: data transfer in real time; up-to-date information with summary reports incorporated. Is flexible to allow changes to types of conditions over time, facilitates reports.

Disadvantages: can become large really quickly, expensive to maintain, clean and update.

5) A combination of paper-based notifications by doctors with electronic entry and storage at a central location offers the following:

Adavantages: can include data from service providers whose services are not computerised. Gives the opportunity for overviews and feedback reports.