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BUSINESS INFORMATION SYSTEM Stock or Inventory control system An information system is a group of things that work together, an information system takes pieces of information from outside the computer and puts them into the system. This being called the input data. The storage function stores the input data and retrieves it when needed, the processing function processes the input and stored data and uses it to help the business while the output function gets the results of the processed data for the use outside the system(Nickerson) During last year I was fortunate enough to work for a large company that sold shade sails, dog beds, shade materials and other things to shops such as K-mart, Target and Big W. The warehouse in which they stored all these materials was absolutely huge, thus you can understand the need