Source : Free On-Line Dictionary of Computing

task scheduling
     
         The assignment of start and end times to a set of
        tasks, subject to certain {constraints}.  Constraints are
        typically either time constraints (the payload must be
        installed before the payload bay doors are closed) or resource
        constraints (this task requires a small crane and a crane
        operator).
     
        In the case where the tasks are programs to run concurrently
        on a computer, this is also known as {multitasking}.
     
        (1998-04-25)