# sector

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## sector

1. Geometry either portion of a circle included between two radii and an arc. Area: ½r2θ, where r is the radius and θ is the central angle subtended by the arc (in radians)
2. a measuring instrument consisting of two graduated arms hinged at one end
3. Computing the smallest addressable portion of the track on a magnetic tape, disk, or drum store
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

## Sector

(1) A sector in the plane is a region bounded by two rays issuing from an interior point of a figure and by an arc of its boundary cut off by these rays. In particular, a sector of a circle is bounded by two radii and an arc cut off by the radii. The area of a sector of a circle is equal to lr/2 or πr2α /360, where l is the length of the arc, α is the central angle (in degrees) subtended by the arc, and r is the radius of the circle.

(2) A sector in space is the part of a solid bounded by a conical surface whose vertex is in the solid and by the part of the solid’s surface cut off by the conical surface. A spherical sector is an example of a sector in space.

## sector

[′sek·tər]
(computer science)
A portion of a track on a magnetic disk or a band on a magnetic drum.
A unit of data stored in such a portion.
(civil engineering)
A clearly defined area or airspace designated for a particular purpose.
(electromagnetism)
Coverage of a radar as measured in azimuth.
(mathematics)
A portion of a circle bounded by two radii and an arc joining their end points.
(meteorology)
Something resembling the sector of a circle, as a warm sector between the warm and cold fronts of a cyclone.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

## sector

The smallest unit of data that is written to and read from a storage drive. The initial hard disk sector sizes were 128 and 256 bytes long but were later increased to 512. Eventually, sectors were enlarged to the "Advanced Format" size of 4,096 bytes. See cluster, sector interleave and magnetic disk.
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References in periodicals archive ?
This paper aims to determine the changes in the purchasing power of the agriculture sector via DFDTOT index within the trade liberalization process in Turkey.
The study also found that the 860,000 Saudis employed during the period before 2000 were hired in the following sectors: 39,100 in the construction sector, 28,500 in the financial services sector, 55,000 in the real estate business, 10,300 in the hotels and restaurants sector, 63,500 in downstream industries, 189,800 in retail and wholesale sectors, 150,600 in the transport, storage and communication sectors, 78,500 in the mining and electricity sectors, 54,100 in the gas and water sectors, and finally 189,000 Saudis were employed in the agriculture, fishing and forestry sectors.
He said the value-added textile sector pays huge taxes to the government, adding that this sector's share in the country's overall revenue accumulation is also significant.
Charles Logan, Director at Hays, said: "These findings highlight that workers believe they cannot move between sectors and that employers aren't always able to understand or give credence to transferable skills.
- Over a third (37%) of private sector workers feel they get better support from management, compared to just a 22% in the public sector.
Deolalkar (2003) observed that priority sector lending is not such a burden on banks.
It is difficult to manage the export sector organization by export practitioners due to lack of time and managerial knowledge.
On the first day of the auction, the 444.44 square yards residential plot 201, in Sector G-10/2 was sold for after receiving a bid of Rs85,000 per square yard Plot 202 in Sector G-10/2 measuring 444.44 sq yds received a bid of Rs84,000 per sqyd, despite the fact that it is adjacent to plot 201.
Mr Olebile said President Dr Mokgweetsi Masisi had pronounced the importance of the agriculture sector hence the need for it to be supported.
Production also increased in the oil refining sector (production stopped in November and December 2017, according to the INS.
In this sector 8 firms are cataloged at PSX with the paid up capital of Rs23,144.20 million.
The cell, headed by the Executive Director of NAVTTC, would comprise of a director and four deputy directors, which is mandated to ensure proactive liaison with the private sector partners, said a press release on Monday.

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