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Concentration can refer to:

Science, engineering, and technology

• Concentration, in chemistry, the measure of how much of a given substance there is mixed with another substance
• Mass concentration (astronomy), a region of a planet or moon's crust that is denser than average
• Number density in physics, chemistry, and astronomy

Entertainment

• Concentration (card game), the card game
• Concentration (game show), American television game show
• Concentration (album), an album by Machines of Loving Grace
• Concentration 20, an album by Namie Amuro

Psychology

• Attentional control, the cognitive process of controlling the focus of attention

Religion

• Samadhi (Buddhism), mental concentration in Buddhism

Economics

• Market concentration, in economics, the number and production share of firms in a market (or industry)
• Concentration ratio, in economics, a measure of market concentration.

Other uses

• Concentration camp, a detention center created for specific groups of people, usually during wartime
• A term used at Brown University, Colgate University, Columbia University, Harvard College, and Saint Olaf College to refer to a type of academic major
• Force concentration, and concentrate, in military tactics, the practice of concentrating military units

See also

• Concentrate (disambiguation)

• Disambiguation pages