Gain
Gain or GAIN may refer to: == Electronics and computing == Gain (electronics), a measure of the ability to increase the power or amplitude of a signal Gain (antenna), a key performance parameter which combines the antenna's directivity and radiation efficiency Gain (laser), the amplification of optical power involved in laser emission Gain (projection screens), a measure of brightness Information gain (decision tree), in mathematics and computer science Gain, the term in adaptive control literature for learning rate, a step size tuning parameter in optimization algorithms == Biology and health == GAIN domain (G-protein-coupled receptor autoproteolysis-inducing domain) 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 non-profit foundation working in the field of malnutrition Generating Antibiotic Incentives Now, Title VIII of the United States's Food and Drug Administration Safety and Innovation Act of 2012 == Arts == Gain (singer) (Son Ga-in, Korean: 손가인; born 1987), a South Korean entertainer Gain (novel), 1998, by American author Richard Powers, about Clare International and Laura Bodey Gain (EP), 2009, by Japanese band Sadie == Economics and finance == Gain (accounting), an increase in market value relative to purchase price of an asset GAIN Capital Holdings, Inc.