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

Parallel run
All of these
Multitasking
Multiprocessing
None of these

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System Analysis and Design
Direct-access organization

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

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