AES can refer to several different things:

• The Advanced Encryption Standard cryptosystem, created by Joan Daemen and Vincent Rijmen.
• The Audio Engineering Society, a professional society devoted to audio technology.
• The American Eugenics Society (AES), a United States society to promote eugenics.
• The AES Corporation , a global power corporation.
• Atomic spectroscopy Auger electron spectroscopy.
• Atomic spectroscopy - Atomic Emission Spectroscopy ICP-MS / ICP-AES