System Analysis and Design
In the system concepts, term Integration

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

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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
has records placed randomly throughout the file
uses an index for each key type

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