Sector

Sector may refer to:

Places

 * Sector, West Virginia, U.S.

Geometry

 * Circular sector, the portion of a disc enclosed by two radii and a circular arc
 * Hyperbolic sector, a region enclosed by two radii and a hyperbolic arc
 * Spherical sector, a portion of a sphere enclosed by a cone of radii from the center of the sphere

Social and economic

 * Business sector, part of the economy which involves the trading and sale of products by companies
 * Economic sector, the manufacturing, finance and production of goods for consumers
 * Private sector, business activity created by private enterprise for profit
 * Public sector, delivers social services, infrastructure and institutions administered by government
 * Voluntary sector, a non-profit and voluntary part of an economy provided by organisations
 * The sector of the sector directive in government procurement in the European Union

Computing

 * Cylinder-head-sector, an early method for giving addresses to blocks of data on a hard drive
 * Disk sector, a subdivision of a track on a disk
 * Sector, or zone, in portal rendering
 * Sector/Sphere, an open source software suite
 * Sector (instrument), a historic calculating instrument

Other uses

 * Sector (administrative division)
 * Sector clock
 * Sector light
 * Sector commander
 * United States Coast Guard Sector, a shore-based unit of the U.S. Coast Guard
 * Sector, a fictional area of space, e.g. in the Foundation series, Star Wars, StarCraft, Warhammer 40,000, Lollipop Chainsaw
 * Sector, or galactic quadrant, regions of space in Star Trek
 * Sector, and Sector No Limits, watch brands
 * Sector General, a series of science fiction novels by James White