From WordNet (r) 3.0 (2006) :
scheduler
n 1: computer hardware that arranges jobs to be done by the
computer in an appropriate order
From The Free On-line Dictionary of Computing (30 December 2018) :
scheduling
scheduler
The arrangement of a number of related operations
in time.
There are several kinds of scheduling related to computers:
instruction scheduling - sequencing the instructions
executed by the CPU
multitasking ("process scheduling") - sharing a CPU between
several processes
application software to help organise your daily meetings
etc.
task scheduling - algorithms to solve the general problem
of satisfying time and resource constraints between a number
of tasks.
Compare planning.
(1998-04-25)