(computing) A new computer part that has been removed from an unused, previously assembled system.

(Britain, Canada) Alternative spelling of honor system

plural of voting system

(law) A system of law in which advocates represent the prosecution and the defence and an impartial person (judge) or people (jury) determine the truth of the matter

(physics) A localized physical system consisting of interacting components, called degrees of freedom

(astronomy) A heliocentric model of the solar system, proposed in the 16th century by the eponymous astronomer.

plural of systems analyst

Alternative spelling of system architecture

plural of systems architecture

(software, system theory) The conceptual model that defines the behavior, structure, and more views of a system.