Klein M.B.O.

International Klein Blue

Klein Bicycle Corporation

Beltrami–Klein model

Klein–Gordon equation

Inocențiu Micu-Klein

Kaluza–Klein theory

Klein High School

Herb Klein (journalist)

Klein (surname)

Frederick Klein

Martin J. Klein

Catharina Klein

Klein Independent School District

Klein polyhedron

Calvin Klein Collection

Hänschen klein

George Klein (biologist)

Klein–Nishina formula

Klein four-group

Bill Klein (businessman)

Steve Klein (musician)

Klein Forest High School

Klein Bünzow station

Anne Klein (politician)

Walter C. Klein

Klein Gladebrügge

Emanuel Edward Klein

Ľudovít Klein

United States v. Klein

Yves Klein Blue

Cayley–Klein metric

Calvin Klein (fashion house)

Rudolf Klein-Rogge

Ralph Klein (basketball)

Klein-Pöchlarn

Jonathan Philip Klein

Elizabeth Klein

Lloyd Klein (ice hockey)

Michael Klein (footballer, born 1959)

Klein Sexual Orientation Grid

Richard Klein (paleoanthropologist)

Charlotte Klein

Guillermo Klein

Donald L. Klein

Paul Klein (art dealer)

Adam Klein (swimmer)

Klein Borstel station

John Klein (soccer, born 1999)

Saskia Keijzer-Klein

Clifford–Klein form

Allen Klein (author)

Klein Glienicke

Freada Kapor Klein

Henri Klein (footballer)

R. Martin Klein

Samuil Micu-Klein

Herb Klein (politician)

Gary Klein (producer)

Michael Klein Stadium (1960)

Julius Leopold Klein

Lori Klein (rabbi)

Arthur G. Klein

Frederick C. Klein

Klein Grünhorn

Margaret D. Klein

Georg Klein (writer)

Klein Memorial Auditorium

Felix Klein Protocols

Jonathan Klein (businessman)

George Klein (inventor)

Klein cubic threefold