measuring instrument consisting of two graduated arms hinged at one end1
a particular aspect of life or activity1
he was helpless in an important sector of his life1
a social group that forms part of the society or the economy1
the public sector1
a portion of a military position1
the minimum track length that can be assigned to store information; unless otherwise specified a sector of data consists of 512 bytes1
a plane figure bounded by two radii and the included arc of a circle1
A portion of the data storage area on a disk. A disk is divided into sides (top and bottom), tracks (rings on each surface), and sectors (sections of each ring). Sectors are the smallest physical storage units on a disk and are of fixed size; typically, they are capable of holding 512 bytes of information apiece.2