Operating System (OS)
Assembler language

is usually the primary user interface
None of these
is quite different from the SCL interpreter
requires fixed-format commands
is a mnemonic form of machine language

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Operating System (OS)
A public key encryption system

allows only the correct receiver to decode the data
allows only the correct sender to decode the data
allows anyone to decode the transmission
does not encode the data before transmitting it
None of these

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