System Analysis and Design
An open rectangle

defines a source or destination of system data
is a data store-data at rest, or a temporary repository of data
represents a process that transforms incoming data flow(s) into outgoing data flows
identifies data flow
None of these

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System Analysis and Design
A Decision table

gets an accurate picture of the system
represents the information flow
shows the decision paths
documents rules, that select one or more actions, based on one or more conditions, from a set of possible conditions.

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