Program
A program is a set of instructions expressed in code that specify work for a computer to perform.
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Operating systems
Computing / Operating systems — newest added first.
Process resources
Process resources are facilities allocated to or accessible by a process, such as memory, open files, and network connections. Resources may be shared between processes.
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Process execution state
Process execution state is the information needed to track and resume a process's execution, including instruction positions, register values, and call stacks. In a multithreaded process, each thread has its own execution state.
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Process
A process is an instance of a program in execution, managed by an operating system, together with its execution state, memory, and associated resources.
A process can be running, ready to run, waiting, or suspended; it need not be executing instructions at every moment.
Reference: Microsoft: About Processes and Threads.
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