Section, Sectioning, or Sectioned may refer to:

Arts, entertainment and media

Section (music) In music, a section is a complete, but not independent, musical idea. Types of sections include the Introduction (music), introduction or intro, Exposition (music), exposition, Musical development, development, recapitulation (music), recapitul ...

, a complete, but not independent, musical idea *

Section (typography) In books and documents, a section is a subdivision, especially of a chapter. In fiction, sections often represent scenes, and accordingly the space separating them is sometimes also called a scene break. Scene breaks represent gaps in story t ...

, a subdivision, especially of a chapter, in books and documents **

Section sign The section sign (§) is a typographical character for referencing individually numbered sections of a document; it is frequently used when citing sections of a legal code. It is also known as the section symbol, section mark, double-s, or si ...

(§), typographical characters *

Section (bookbinding) In bookbinding, a section, gathering, or signature is a group of sheets folded in half, to be worked into the binding as a unit. The section is the basic building block of codex bindings. In Western bookbinding, sections are sewn through thei ...

, a group of sheets, folded in the middle, bound into the binding together *

The Section (band) The Section was a United States instrumental rock/jazz fusion band formed in the early 1970s by guitarist Danny Kortchmar, keyboardist Craig Doerge, bassist Leland Sklar, and drummer Russ Kunkel. Other musicians associated with the group include ...

, a 1970s American instrumental rock band * ''The Outpost'' (1995 film), also known as ''The Section'' * Section, an instrumental group within an

orchestra An orchestra (; ) is a large instrumental ensemble typical of classical music, which combines instruments from different families. There are typically four main sections of instruments: * String instruments, such as the violin, viola, cello, ...

* "Section", a song by 2 Chainz from the 2016 album ''

ColleGrove ''ColleGrove'' is the third studio album by American rapper 2 Chainz. It was released on March 4, 2016, by Def Jam Recordings. The album is a collaborative effort between him and fellow American rapper Lil Wayne, but due to the latter's record la ...

'' * "Sectioning" (''Peep Show''), a 2005 television episode * David "Section" Mason, a fictional character in '' Call of Duty: Black Ops II''

Organisations

* Section (Alpine club) *

Section (military unit) A section is a military sub-subunit. It usually consists of between 6 and 20 personnel. NATO and U.S. doctrine define a section as an organization "larger than a squad, but smaller than a platoon." As such, two or more sections usually make up ...

* Section (Scouting)

Science, technology and mathematics

Science

Section (archaeology) In archaeology a section is a view in part of the archaeological sequence showing it in the vertical plane, as a cross section, and thereby illustrating its profile and stratigraphy. This may make it easier to view and interpret as it developed ...

, a view in part of the archaeological sequence showing it in the vertical plane *

Section (biology) In biology a section () is a taxonomic rank that is applied differently in botany and zoology. In botany Within flora (plants), 'section' refers to a ''botanical'' rank below the genus, but above the species: * Domain > Kingdom > Division > ...

, a taxonomic rank that is applied differently between botany and zoology **

Section (botany) In botany, a section () is a taxonomic rank below the genus, but above the species. The subgenus, if present, is higher than the section; and the rank of Series (botany), series, if present, is below the section. Sections may in turn be divided i ...

Histological section Histology, also known as microscopic anatomy or microanatomy, is the branch of biology that studies the microscopic anatomy of biological tissues. Histology is the microscopic counterpart to gross anatomy, which looks at larger structures visi ...

, a thin slice of tissue used for microscopic examination, achieved by sectioning

Mathematics

Section (category theory) In category theory, a branch of mathematics, a section is a right inverse of some morphism. Dually, a retraction is a left inverse of some morphism. In other words, if f: X\to Y and g: Y\to X are morphisms whose composition f \circ g: Y\to Y ...

, a right inverse of some morphism **

Section (fiber bundle) In the mathematical field of topology, a section (or cross section) of a fiber bundle E is a continuous right inverse of the projection function \pi. In other words, if E is a fiber bundle over a base space, B: : \pi \colon E \to B then ...

, in topology ** Part of a

sheaf (mathematics) In mathematics, a sheaf (: sheaves) is a tool for systematically tracking data (such as sets, abelian groups, rings) attached to the open sets of a topological space and defined locally with regard to them. For example, for each open set, the ...

* Section (group theory), a quotient object of a subobject *

Conic section A conic section, conic or a quadratic curve is a curve obtained from a cone's surface intersecting a plane. The three types of conic section are the hyperbola, the parabola, and the ellipse; the circle is a special case of the ellipse, tho ...

, intersection of a cone and a plane

Other uses in science and technology

* , an

HTML5 HTML5 (Hypertext Markup Language 5) is a markup language used for structuring and presenting hypertext documents on the World Wide Web. It was the fifth and final major HTML version that is now a retired World Wide Web Consortium (W3C) recommend ...

markup *

Sectioning (car) Involuntary commitment, civil commitment, or involuntary hospitalization/hospitalisation, or informally in Britain sectioning, being sectioned, commitment, or being committed, is a legal process through which an individual who is deemed by a qual ...

, a customization of hot rod cars

Surveying

Section (United States land surveying) In U.S. land surveying under the Public Land Survey System (PLSS), a section is an area nominally , containing , with 36 sections making up one survey township on a rectangular grid. The legal description of a tract of land under the PLSS incl ...

, an area nominally one square mile * Section, an area of one square mile in

Dominion Land Survey The Dominion Land Survey (DLS; ) is the method used to divide most of Western Canada into one-square-mile (2.6 km2) sections for agricultural and other purposes. It is based on the layout of the Public Land Survey System used in the United St ...

, Western Canada * Section, part of the

Alberta Township System The Alberta Township System (ATS) is a land surveying system used in the Canadian province of Alberta and other parts of western Canada. History and background In principle there is a mathematical basis for the Alberta Township System (ATS) var ...

Other uses

Section, Alabama Section is a town in Jackson County, Alabama, United States and is included in the Chattanooga-Cleveland-Dalton, TN-GA-AL Combined Statistical Area. As of the 2010 census, the population of the town was 770, an increase of one person (769) fro ...

, a town in the United States *

Section (rail transport) In rail transport, a section could refer to: a portion of a train that may be operated independently and/or combined with other sections to operate as a single unit; or a portion of railway line designated for railway signalling, signalling or main ...

, a portion of railway line or a portion of a train *

Sectioning Involuntary commitment, civil commitment, or involuntary hospitalization/hospitalisation, or informally in Britain sectioning, being sectioned, commitment, or being committed, is a legal process through which an individual who is deemed by a qual ...

, involuntary commitment for severe mental illness