process

A unique, finite course of events defined by its purpose or by its effect, achieved under defined conditions.
Any operation or combination of operations on data.
A function being performed or waiting to be performed.
A program in operation; for example, a daemon is a system process that is always running on the system.
An address space, one or more threads of control that run within that address space, and the required system resources.
A collection of system resources that include one or more threads of execution that perform a task.