System Analysis and Design
System prototyping helps the designer in

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

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System Analysis and Design
Indexed-Sequential organization

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

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