A communication system in which multiple users share a common channel in a way that can lead to conflicts.

The act of systematizing / A systematic organization

To arrange into a systematic order; to make systematic; to organise as a system

A system of beliefs.

plural of package management system

plural of contention system

plural of belief system

(physiology) The parts of an animal body comprising the heart, blood vessels (arteries, veins, and capillaries), and blood, which circulate the blood around the body.

(medicine) A blood group system, the second most important after the ABO system, and important in human blood transfusion, whereby blood types are classified according to the presence ("positive") or absence ("negative") of potentially over 50 antigens, of which the most commonly referenced is RhD.

In Latin, the three perfect tenses: perfect, future perfect, and pluperfect or past perfect, as contrasted with the present system: present, future, and imperfect. A verb in the perfect system indicates an action that has completed.