# 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 It might be outdated or ideologically biased.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.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

## 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.
Copyright © 1981-2019 by The Computer Language Company Inc. All Rights reserved. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction is strictly prohibited without permission from the publisher.
References in periodicals archive ?
Thus, an increased need for sectoral reallocation may temporarily increase the economy's natural rate of unemployment and lower its rate of employment growth.
In contrast, new growth models give a feasible way of relating real convergence processes with sectoral structure since they consider other mechanisms that may either facilitate or impede the convergence process.
Similarly, Few studies explored the exchange rate volatility effects on sectoral stocks (Al-Shboul and Anwar, 2014; Olugbode, El-Masry, and Pointon, 2014; Miao et al., 2013).
'When we break down this enormous number to bite size figures, we will realize that this transnational crime of human trafficking can be lowered down through stronger collaborations, international cooperation, and closer ties between and among the Asean member-states and sectoral bodies,' Florece said.
On the occasion of the 31st ASEAN Summit last year, ASEAN leaders noted the Bohol Plan 2017-2020, which has been finalized after its full endorsement by all of the relevant ASEAN sectoral bodies.
The findings will be used to recommend a uniform and standard sectoral reporting framework for lending by deposit taking Saccos.
The Russia sectoral sanctions program prohibits U.S.
i) Sectoral diversification has a negative impact on returns and a positive impact on risk of banks in dual-banking systems.
While measuring the regional and sectoral impact of monetary shocks across the Netherlands, Arnold and Vrugst (2002) find large regional and sectoral variation in monetary policy.
Muscat, Feb.5 (ONA) Majlis A'Shura's Youth and Human Resources Committee hosted today the joint sectoral committee for Omanisation in the electricity and water sector and a number of stakeholders in the sector as part of the committee's study on the follow-up of the analysis of the recruitment of the national workforce.
One is extended by [16] from [15] highlighting sectoral differences in technological growth rates.
Summary: Mining and quarrying Sectoral growth was up to 2.7%EeYoY, the strongest print since 1Q16.

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