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System Maintenance Operations
System maintenance is concerned with keeping the hardware and software working. This .involves the following operations: 20 Information System and Networks
User support is concerned with ensuring that users know how to make the most optimum use of the system, and providing necessary training to the users of the system. Also, user documentation and help-desk facilities form important user support tools. Security is one of the important considerations for the proper and continued functioning of an information system.
Loss of security may originate in accidental and deliberate threats. Accidental threats arise due to poor system features like overloading, or software bugs. Deliberate threats arise from human intent, and include theft, computer fraud, vandalism and other attempts to break the system. Such threats may lead to:
In order to prevent security threats, .the organisation should have a carefully formulated security policy. It is also essential that each one of the staff members associated with the system acknowledge their responsibility for security.
KWIC (Key Word in Context) Index A KWIC index is the most common type of natural language indexes. It has become popular because it is straight-forward and relatively easier
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