Gain

Gain or GAIN may refer to:

Science and technology

 * Gain (electronics), an electronics and signal processing term
 * Antenna gain
 * Gain (laser), the amplification involved in laser emission
 * Gain (projection screens)
 * Information gain in decision trees, in mathematics and computer science
 * GAIN domain, a protein domain
 * Learning rate, a tuning parameter in stochastic approximation methods, also known as gain

Health

 * Primary and secondary gain, psychological mechanisms that may underlie an illness
 * Global Appraisal of Individual Needs, a set of psychological assessment instruments
 * Global Alliance for Improved Nutrition, a Swiss Foundation working in the field of malnutrition
 * Generating Antibiotic Incentives Now, a piece of American legislation

People

 * Gain (singer), a South Korean entertainer
 * Gain, anglicised form of Indian surname Gayen

Other uses

 * Gain (accounting), the increase of net profit
 * Gain (novel), a novel by American author Richard Powers
 * Gain (EP), an album by Sadie
 * Gain (detergent), a brand of detergent
 * GAIN Capital, a US-based forex trading company
 * Greater Avenues to Independence program, a precursor to the American CalWORKs welfare program