System Analysis and Design
The approach used in top-down analysis and design is

to prepare flow charts after programming has been completed
to identify a top level function an d then create a hierarchy of lower-level modules and components.
to identify the top level functions by combining many smaller components into a single entity
all of the listed here

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System Analysis and Design
Most algorithms follow the format of

Entering the output items, then displaying the output items, and then processing the output items
Entering the input items, then processing the input items, and then displaying the output items
Entering the input items, then processing the output items, and then displaying the output items
Entering the input items, then displaying the input items, and then processing the output items
Entering the output items, then processing the output items, and then displaying the output items

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