A4A may refer to:
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Adam4Adam
Adam4Adam is an online dating website designed for men to meet other men "for friendship, romance, or a hot hookup".
Ranking
As of September 2005, ''San Jose Mercury News'' ranked Adam4Adam as the second most popular online gay personals site ...
, a gay dating service
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Airlines for America
Airlines for America (A4A), formerly known as Air Transport Association of America (ATA), is an American trade association and lobbying group based in Washington, D.C. that has represented major North American airlines since 1936.
The A4A ...
, an industry association in the United States
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Apps4Africa, an African innovation accelerator
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