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Using Information in Information System
Information Systems can be thought of as being useful at three levels:
The detail level where information is used to carry out discrete tasks in support of the operations of the business, examples are the use of spreadsheet or CAD toolsets. This information will mostly be used by first line employees carrying out the basic activities for the operation.
Each of the three levels has a slightly different emphasis in terms of required knowledge but each has to be informed by the same set of captured data and the same systemic tool that processes and manipulates it.
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All digital devices are made from circuits whichcan be switched between two possible states.These two states are represented by a voltagelevel at the output of the circuit e.g. 0V
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Q. Explain about Wide Area Network? Wide Area Network (WAN) usually refers to a network, which covers a large geographical area as well as use communications subnets (circuits)
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