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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System Analysis and Design
Inverted list organization

uses an index for each key type
has records placed randomly throughout the file
means storing records in contiguous blocks according to a key.
Stores records sequentially but uses an index to locate records
None of these

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