System Analysis and Design
Indexed-Sequential organization

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

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System Analysis and Design
System prototyping helps the designer in

all of the listed here
making the programmers understand how the system will function.
giving a demo of the software, to the system manager to whom he reports
communicating to the user, quickly, how the system, when developed, will look like and get a feedback.

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