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1.2) Information systems in context

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1.2) Information systems in context

  1. 1. • A system is a group of elements that work together to achieve a purpose. • An information system performs a set of information processes requiring participants, data/information and information technology. • The relationships between the elements of an information system are shown below.
  2. 2. [ DRAW Figure 1.3 from p.7] • Information systems have a purpose, which means that they address the needs of a group or individual. • The environment is everything that influences, or is influenced by, an information system. • Information technology is the set of tools used by the information system or its participants to perform work.
  3. 3. • Hardware is the physical equipment involved in processing information. • All devices perform one of the five following functions: •input •output •processing •storage •control • All these different functions work together.
  4. 4. • Software is the detailed instructions that direct the hardware to perform certain tasks. • There are two main kinds of software: • application – programs for a specific task • system – manages and controls computer • Data is the raw material that is entered into an information system. • Data is unprocessed and not yet useful to the user.
  5. 5. • Information has been processed and given meaning. • It is created or modified by one or more information processes. • Participants are the people who carry out the information processes. • Participants are also called direct users since they interact with the system. • Indirect users are NOT part of the system but they are affected by it.

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