Operating System (OS)
An operating system is a program or a group of programs that

Manages the resources of the Computer
Helps in checking the spelling of Word
Maintain the relationship in Database
Performs the calculations of cells in Excel

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Operating System (OS)
Memory

is typically characterized by interactive processing and time-slicing of the CPU
is a sequence of instructions
is the device where information is stored
None of these
is a device that performs a sequence of operations specified by instructions in memory.

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