Class, Classes, or The Class may refer to:

Common uses not otherwise categorized

Class (biology) In biological classification, class () is a taxonomic rank, as well as a taxonomic unit, a taxon, in that rank. It is a group of related taxonomic orders. Other well-known ranks in descending order of size are domain, kingdom, phylum, o ...

, a taxonomic rank *

Class (knowledge representation) In knowledge representation, a class is a collection of individuals or individuals objects. A class can be defined either by extension (specifying members), or by intension (specifying conditions), using what is called in some ontology languages ...

, a collection of individuals or objects * Class (philosophy), an analytical concept used differently from such group phenomena as "types" or "kinds" *

Class (set theory) In set theory and its applications throughout mathematics, a class is a collection of sets (or sometimes other mathematical objects) that can be unambiguously defined by a property that all its members share. Classes act as a way to have set-like ...

, a collection of sets that can be unambiguously defined by a property that all its members share * Hazard class, a dangerous goods classification *

Social class A social class or social stratum is a grouping of people into a set of Dominance hierarchy, hierarchical social categories, the most common being the working class and the Bourgeoisie, capitalist class. Membership of a social class can for exam ...

, the hierarchical arrangement of individuals in society, usually defined by wealth and occupation *

Working class The working class is a subset of employees who are compensated with wage or salary-based contracts, whose exact membership varies from definition to definition. Members of the working class rely primarily upon earnings from wage labour. Most c ...

, can be defined by rank, income or collar

Arts, entertainment, and media

* "The Class" (song), 1959 Chubby Checker song *

Character class In tabletop games and video games, a character class is an occupation, profession, or role assigned to a game character to highlight and differentiate their capabilities and specializations. In role-playing games (RPGs), character classes ag ...

in role-playing games and other genres * Class 95 (radio station), a Singaporean radio channel

Films

* ''Class'' (film), 1983 American film * ''The Class'' (2007 film), 2007 Estonian film * ''The Class'' (2008 film), 2008 film (''Entre les murs'')

Television

* ''Class'' (2016 TV series), a 2016 British spinoff from ''Doctor Who'' * ''The Class'' (TV series), a CBS sitcom * ''Class'' (2023 TV series), a 2023 Indian Netflix teen drama

Literature

*'' Class: A Guide Through the American Status System'', a book by Paul Fussell * ''Class'' (Cooper book), a 1979 non-fiction work by Jilly Cooper * ''Class'' (Pacifico novel), a 2014 novel by Francesco Pacifico * ''Class'' (Rosenfeld novel), a 2017 novel by Lucinda Rosenfeld * ''The Class'' (Segal novel), a 1985 novel by Erich Segal

Computing

Class (computer programming) In object-oriented programming, a class defines the shared aspects of objects created from the class. The capabilities of a class differ between programming languages, but generally the shared aspects consist of state ( variables) and behavior ( ...

, programming construct for defining an object template *

Class (warez) CLASS (CLS) was a notorious and prolific warez group that existed between January 1, 1997, and January 9, 2004. The group was the target of federal raids such as Operation Fastlink. They specialized in cracked games, and sometimes had elaborate ...

, a defunct group in the warez scene *

C++ classes A class in C++ is a user-defined type or data structure declared with any of the keywords class, struct or union (the first two are collectively referred to as non-union classes) that has data and functions (also called member variables and me ...

, C++ language construct for defining an object template *

Class attribute (HTML) HTML attributes are special words used to adjust the behavior or display of an ''HTML element''. An attribute either modifies the default functionality of an element type or provides functionality to certain element types unable to function corre ...

, a feature of many HTML and XHTML elements *

Class attributes (computer programming) Class attribute may refer to: * Class attribute (HTML), an HTML attribute which is a feature of many HTML and XHTML elements, typically to identify them for styles * Class attributes (computer programming), defining the structure of a class See a ...

, defining the structure of a class *

Complexity class In computational complexity theory, a complexity class is a set (mathematics), set of computational problems "of related resource-based computational complexity, complexity". The two most commonly analyzed resources are time complexity, time and s ...

, a set of problems of related complexity in computational complexity theory *

Java class file A Java class file is a file (with the filename extension) containing Java bytecode that can be executed on the Java Virtual Machine (JVM). A Java class file is usually produced by a Java compiler from Java programming language source files ...

, computer file containing Java bytecode * Pseudo-class, cascading style sheet (CSS) construct for defining formatting *

Type class In computer science, a type class is a type system construct that supports ad hoc polymorphism. This is achieved by adding constraints to type variables in parametrically polymorphic types. Such a constraint typically involves a type class T a ...

, a type system construct that supports polymorphism

Education

Class (education) A class in education has a variety of related meanings. It can be the group of students which attends a specific course or lesson at a university, school, or other educational institution, see '' Form (education)''. It can refer to a cours ...

, a group of students attending a specific course or lesson * Class, a

course (education) In higher education, a course is a unit of teaching that typically lasts one academic term, is led by one or more instructors (teachers or professors), and has a fixed roster of students. A course usually covers an individual subject. Courses gene ...

* Class, a lesson or course session, in education *

Classroom A classroom, schoolroom or lecture room is a learning space in which both children and adults learn. Classrooms are found in educational institutions of all kinds, ranging from preschools to universities, and may also be found in other place ...

, a room where classes are held

Law and government

* Class, a group of people involved in a

class action A class action is a form of lawsuit. Class Action may also refer to: * ''Class Action'' (film), 1991, starring Gene Hackman and Mary Elizabeth Mastrantonio * Class Action (band), a garage house band * "Class Action" (''Teenage Robot''), a 2002 e ...

lawsuit *

Classes of United States senators The 100 seats in the United States Senate are divided into three classes for the purpose of determining which seats will be up for election in any two-year cycle, with only one class being up for election at a time. With senators being elected ...

, for describing the schedules of elections for Senate seats

Transportation

* Class (locomotive), a single design of a locomotive as assigned by the railroad *

Class rating Class, Classes, or The Class may refer to: Common uses not otherwise categorized * Class (biology), a taxonomic rank * Class (knowledge representation), a collection of individuals or objects * Class (philosophy), an analytical concept used di ...

, an allowance to fly aircraft of similar design *Classification of United States railroads: **

Class I railroad Railroad classes are the system by which Rail freight transport, freight railroads are designated in the United States. Railroads are assigned to Class I, II or III according to annual revenue criteria originally set by the Surface Transportatio ...

** Class II railroad **

Class III railroad Railroad classes are the system by which freight railroads are designated in the United States. Railroads are assigned to Class I, II or III according to annual revenue criteria originally set by the Surface Transportation Board in 1992. With a ...

Ship class A ship class is a group of ships of a similar design. This is distinct from a ship type, which might reflect a similarity of tonnage or intended use. For example, is a nuclear aircraft carrier (ship type) of the (ship class). In the course o ...

, a group of ships of similar design *

Travel class A travel class is a quality of accommodation on public transport. The accommodation could be a seat or a cabin for example. Higher travel classes are designed to be more comfortable and are typically more expensive. Airlines Traditionally ...

, a quality of accommodation on public transport *

Vehicle size class Vehicle size classes are series of ratings assigned to different segments of Motor vehicle, automotive vehicles for the purposes of vehicle emissions control and Fuel economy in automobiles, fuel economy calculation. Various methods are used to c ...

, a way of classifying cars