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.