AID may refer to:

• Activation-Induced (Cytidine) Deaminase, an enzyme
• Algebraic Interpretive Dialogue, an implementation of JOSS II for the PDP-10
• Americans for Informed Democracy, an American non-profit organization
• Artificial Insemination by Donor, a type of human artificial insemination in which donor sperm are provided by an individual other than the recipient's partner
• Association for India's Development, an American/Indian non-profit organization
• Automatic Interaction Detection, a precursor to, and component of CHAID
• Amputee identity disorder, now more commonly known as Body integrity identity disorder, a controversial psychological and neurological mental disorder.
• Autoimmune disease, a disorder with an overactive immune response of the body.
• Aid (rapper) (born 1990), stagename of Aida Alonso Iglesias, a Spanish rap singer.

See also

• Aid (international aid)
• Feudal aid, feudal taxation
• AIDS Acquired immunodeficiency syndrome
• USAID United States Agency for International Development

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