Wednesday, 20 June 2012

Definition Of Data, Information and Information System

  • Data and information are used in our daily life. Each type of data has its own importance that contribute toward useful information.
  • Data is like raw material. It is not organised and has little value. Data can include text, numbers, images, audio and video.
  • Text data consists of sentences and paragraphs.
  • Number or numerical data consists of digits from 0 to 9.
  • Image data are graphical images.
  • Audio data can be sound, voice or tones
  • Video data consist of moving images
  • Information is organised data that is valuable and meaningful to a specific user.
  • Information system is a set of a related components that collects data, processes data and provides information.
    For example: School Grading System is the information system used in schools. In this system, student’s mark are the input data that must be obtained from the class teachers.
    Process involves making calculations, comparing, grading and storing data.
    In a School Grading System, output usually in the form of documents. Output can be digital or in printed format. 
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