System Analysis and Design
Conversion method in which users, being used to an old system, continue to use the old system, alongside the new system, is

multitasking
parallel run
None of these
multi processing
All of these

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System Analysis and Design
An open rectangle

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

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