sectorとは何ですか?Mathematics The portion of a circle bounded by two radii and the included arc.Mathematics A measuring instrument consisting of two graduated arms hinged together at one end.A division of a defensive position for which one military unit is responsible.A division of an offensive military position.A part or division, as of a city or a national economy: the manufacturing sector; the private sector. Computer Science A portion of a magnetic storage device making up the smallest addressable unit of information.To divide (something) into sectors.