# Gain

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**Gain** or **GAIN** may refer to:

## Science and technology

- [Gain (electronics)](/source/Gain_(electronics)), an electronics and signal processing term
- [Antenna gain](/source/Antenna_gain)
- [Gain (laser)](/source/Gain_(laser)), the amplification involved in laser emission
- [Gain (projection screens)](/source/Gain_(projection_screens))
- [Information gain in decision trees](/source/Information_gain_in_decision_trees), in mathematics and computer science
- [GAIN domain](/source/GAIN_domain), a protein domain
- [Learning rate](/source/Learning_rate), a tuning parameter in stochastic approximation methods, also known as gain

## Health

- [Primary and secondary gain](/source/Primary_and_secondary_gain), psychological mechanisms that may underlie an illness
- [Global Appraisal of Individual Needs](/source/Global_Appraisal_of_Individual_Needs), a set of psychological assessment instruments
- [Global Alliance for Improved Nutrition](/source/Global_Alliance_for_Improved_Nutrition), a Swiss Foundation working in the field of malnutrition
- [Generating Antibiotic Incentives Now](/source/Generating_Antibiotic_Incentives_Now), a piece of American legislation

## People

- [Gain (singer)](/source/Gain_(singer)), a South Korean entertainer
- Gain, anglicised form of Indian surname [Gayen](/source/Gayen)

## Other uses

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

## See also

- [Gein (disambiguation)](/source/Gein_(disambiguation))
- [Gayn (disambiguation)](/source/Gayn_(disambiguation))
- [Gane](/source/Gane)
- [Gian](/source/Gian)

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Adapted from the Wikipedia article [Gain](https://en.wikipedia.org/wiki/Gain) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Gain?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.