In the context of computer hardware
, a sector
is a sub-division of a track
. A sector stores a fixed amount of data. The typical formatting of sectors allows holding 512 bytes of data.
In mathematics (geometry), a sector is part if a circle that is defined by angles.
See also: hard disk drive, hard disk drive partitioning, FAT
In economics, analysis can divide the totality of economic activity into sectors. See for example private sector, government sector.