The difference between Sector and Sphere

Sector as a noun:

section

Sector as a noun:

zone (designated area).

Sector as a noun (geometry):

part of a circle, extending to the center

Sector as a noun (computing):

fixed-sized unit (traditionally 512 bytes) of sequential data stored on a track of a digital medium (compare to block)

Sector as a noun (military):

an area designated by boundaries within which a unit operates, and for which it is responsible

Sector as a noun (military):

one of the subdivisions of a coastal frontier

Sector as a noun (science fiction):

a fictional region of space designated for navigational or governance purposes.

Sector as a noun (calculation):

an instrument consisting of two rulers of equal length joined by a hinge.

Sector as a noun:

a field of economic activity

Sector as a noun (engineering):

A toothed gear whose face is the arc of a circle.

Sphere as a noun (mathematics):

A regular three-dimensional object in which every cross-section is a circle; the figure described by the revolution of a circle about its diameter .

Sphere as a noun:

A spherical physical object; a globe or ball.

Sphere as a noun (astronomy, now, _, rare):

The apparent outer limit of space; the edge of the heavens, imagined as a hollow globe within which celestial bodies appear to be embedded.

Sphere as a noun (historical, astronomy, mythology):

Any of the concentric hollow transparent globes formerly believed to rotate around the Earth, and which carried the heavenly bodies; there were originally believed to be eight, and later nine and ten; friction between them was thought to cause a harmonious sound (the music of the spheres).

Sphere as a noun (mythology):

An area of activity for a planet; or by extension, an area of influence for a god, hero etc.

Sphere as a noun (figuratively):

The region in which something or someone is active; one's province, domain.

Sphere as a noun (geometry):

The set of all points in three-dimensional Euclidean space (or n-dimensional space, in topology) that are a fixed distance from a fixed point .

Sphere as a noun (logic):

The extension of a general conception, or the totality of the individuals or species to which it may be applied.

Sphere as a verb (transitive):

To place in a sphere, or among the spheres; to ensphere.

Sphere as a verb (transitive):

To make round or spherical; to perfect.