Klein may refer to:

People

Klein (surname) Klein is the German language, German, Dutch language, Dutch, Afrikaans, and Yiddish word for "small", which came to be used as a surname, and thence passed into the names of places, concepts and discoveries associated with bearers of this surname.ht ...

* Klein (musician)

Places

* Klein (crater), a lunar feature * Klein, Montana, United States * Klein, Texas, United States * Klein (Ohm), a river of Hesse, Germany, tributary of the Ohm * Klein River, a river in the Western Cape province of South Africa

Business

* Klein Bikes, a bicycle manufacturer * Klein Tools, a manufacturer * S. Klein, a department store * Klein Modellbahn, an Austrian model railway manufacturer

Arts

* Klein + M.B.O., an Italian musical group *

Klein Award The MoCCA Arts Festival, or MoCCA Fest, is an independent comics showcase that typically includes artist booths, slide shows, and educational panels. It was created by the Museum of Comic and Cartoon Art in 2002 by bringing together over 2,000 ar ...

, for comic art *

Yves Klein Yves Klein (; 28 April 1928 – 6 June 1962) was a French artist and an important figure in post-war European art. He was a leading member of the French artistic movement of Nouveau réalisme founded in 1960 by art critic Pierre Restany. Klein wa ...

, French artist

Mathematics

Klein bottle In mathematics, the Klein bottle () is an example of a Orientability, non-orientable Surface (topology), surface; that is, informally, a one-sided surface which, if traveled upon, could be followed back to the point of origin while flipping the ...

, an unusual shape in topology *

Klein geometry In mathematics, a Klein geometry is a type of geometry motivated by Felix Klein in his influential Erlangen program. More specifically, it is a homogeneous space ''X'' together with a transitive action on ''X'' by a Lie group ''G'', which acts as ...

* Klein configuration, in geometry * Klein cubic (disambiguation) * Klein graphs, in graph theory * Klein model, or Beltrami–Klein model, a model of hyperbolic geometry *

Klein polyhedron In the geometry of numbers, the Klein polyhedron, named after Felix Klein, is used to generalize the concept of simple continued fractions to higher dimensions. Definition Let \textstyle C be a closed Simplicial complex, simplicial Cone (linear ...

, a generalization of continued fractions to higher dimensions, in the geometry of numbers *

Klein surface In mathematics, a Klein surface is a dianalytic manifold of complex dimension 1. Klein surfaces may have a boundary and need not be orientable. Klein surfaces generalize Riemann surfaces. While the latter are used to study algebraic curves ov ...

, a dianalytic manifold of complex dimension 1

Other uses

* Kleins,

Lineman's pliers Lineman's pliers (US English), Kleins (genericized trademark, US usage), linesman pliers (Canadian English), side cutting linesman pliers and combination pliers (UK / US English) are a type of pliers used by lineworkers, electricians, and othe ...

, a hand tool used by electricians and others *

Klein Technique Klein may refer to: People *Klein (surname) * Klein (musician) Places * Klein (crater), a lunar feature * Klein, Montana, United States * Klein, Texas, United States * Klein (Ohm), a river of Hesse, Germany, tributary of the Ohm * Klein River, a ...

, a movement/dance technique developed by Susan Klein and studied by