Meaning

• 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

  "public sector;  private sector"

• 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.