AFF, Aff or aff may refer to:
Affirmative action (known as reservation in India and Nepal and positive discrimination in the UK; also known in a narrower context as employment equity in Canada and South Africa) is the policy of favoring members of a disadvantaged group who suffer or have suffered from discrimination within a culture.
Affiliate marketing is a type of performance-based marketing in which a business rewards one or more affiliates for each visitor or customer brought by the affiliate's own marketing efforts.
Affirmative action in the United States is a set of laws, policies, guidelines, and administrative practices "intended to end and correct the effects of a specific form of discrimination." These include government-mandated, government-sanctioned, and voluntary private programs that tend to focus on access to education and employment, specifically granting special consideration to historically excluded groups such as racial minorities or women.
Affordable housing is housing deemed affordable to those with a median household income as rated by country, State (province), region or municipality by a recognized Housing Affordability Index.
Affective computing is the study and development of systems and devices that can recognize, interpret, process, and simulate human affects.
Affective forecasting (also known as hedonic forecasting, or the hedonic forecasting mechanism) is the prediction of one's affect (emotional state) in the future.
In mathematics, an affine space is a geometric structure that generalizes the properties of Euclidean spaces that are independent of the concepts of distance and measure of angles, keeping only the properties related to parallelism and ratio of lengths for parallel line segments.
Affect is the experience of feeling or emotion. Affect is a key part of the process of an organism's interaction with stimuli.
Afforestation is the establishment of a forest or stand of trees in an area where there was no previous tree cover.