Class

Class could mean:

Social class refers to the differences between groups in societies or cultures, and is a basic idea in economics, sociology and other social sciences
Class (education), a group of students in a course or lesson
 class, a lesson, in education
 class, short for a classroom

Class (biology), a rank used in taxonomy
Class (philosophy), distinguishes between classes and types
Class (set theory), in mathematics
Travel class

 Media, entertainment and sport 
Character class in role-playing games and other genres
Class (film), a romantic comedy released in 1983
Class: A Guide Through the American Status System, a book by Paul Fussell
The Class, a CBS sitcom which began in fall 2006
Class, known as one-design in sailing, where boats built the same way race against each other

 Technology 
Appliance classes, in making electric appliances
Class (emission), a type of radio emission
Ship class, in a navy, a set of vessels that are built the same way

 Computer science 
Class (programming), related to object-oriented programming
Class (file format), a Java file format
Class (warez), a warez group that stopped being used
Class attribute, a part of many HTML and XHTML elements, such as div and span, often to help apply styles

 Railroads 
Class (locomotive), a railroad locomotive design as assigned by the railroad
The classification of United States railroads by income:
Class I railroad
Class II railroad
Class III railroad

 Other 
Classes of United States Senators
CLASS, Community Leaders At Service of Society, a non-profit organization in Silicon Valley, California.
 "Class", British slang word meaning "great" or "fabulous".