Operating System is a Resource Manager.
Handles multiple computer resources: CPU, Internal/External memory, Processes, Tasks, Applications, Users, etc…
Manages and allocates resources to multiple users or multiple jobs running at the same time (e.g., processor time, memory space, I/O devices)
Arranges to use the computer hardware in an efficient manner (maximize throughput, minimize response time) and in a fair manner.
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It is a Control Program.
Manages all the components of a complex computer system in an integrated manner.
Controls the execution of user programs and I/O devices to prevent errors and improper use of the computer resources.
Looks over and protects the computer.
It is an extended/virtual machine
An interface between the user and hardware that hides the details of the hardware (e.g., I/O).
Constructs higher-level (virtual) resources out of lower-level (physical) resources (e.g., files).
Definition: Is a collection of software enhancements, executed on the bare hardware, culminating in a high-level virtual machine that serves as an advanced programming environment.
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