Section
Zone (designated area).
Part of a circle, extending to the center
Fixed-sized unit (traditionally 512 bytes) of sequential data stored on a track of a digital medium (compare to block)
An area designated by boundaries within which a unit operates, and for which it is responsible
One of the subdivisions of a coastal frontier
A fictional region of space designated for navigational or governance purposes.
(calculation) an instrument consisting of two rulers of equal length joined by a hinge.
A field of economic activity
A toothed gear whose face is the arc of a circle.
A fixed, continuous section of the track, such that sectors do not overlap but all sectors make up the whole track.