Operating System (OS)
The advantage of a command processor running only built-in commands is:

the command set being common across different hardware configurations
None of these
users can create system programs and run them as commands
the processing is much faster than would other-wise be the case when user defined commands are used
flexibility to the users in running lists of commands by simply collecting them in named batch command files

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Operating System (OS)
Multiprogramming systems:

None of these
execute each job faster
are used only on large mainframe computers
execute more jobs in the same time period
are easier to develop than single programming system

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