System Analysis and Design
In the system concepts, term Integration

implies structure and order
refers to the manner in which each component functions with other components of the system.
refers to the holism of systems
means that parts of the computer system depend on one another

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System Analysis and Design
Indexed-Sequential organization

stores records sequentially but uses an index to locate records
means storing records in contiguous blocks according to a key
uses an index for each key type
has records placed randomly throughout the file

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