"The components of the nervous system (peripheral and central) concerned with the regulation of smooth muscle, cardiac muscle, and glands" (source)
See also: parasympathetic division, sympathetic division.
Guyton Medical Physiology textbook CHAPTER 60 – The Autonomic Nervous System and the Adrenal Medulla
Another textbook chapter about the Autonomic Nervous System (use the search function there to access content).