Decision  Support Systems
Data Analysis and OLAP
Data Warehousing
Data Mining
...
Decision-support systems are used to make business decisions, often based on data collected by on-line transaction-processing systems.
Examples of business decisions:
What items to stock?
What insurance premium to change?
To whom to send advertisements?
Examples of data used for making decisions
    Retail sales transaction details
    Customer profiles (income, age, gender, etc.)

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