AC, A.C. or Ac may refer to:
The Academy Awards, known as the Oscars, is a group of twenty-four awards for artistic and technical merit in the American film industry, given annually by the Academy of Motion Picture Arts and Sciences (AMPAS), to recognize excellence in cinematic achievements as assessed by the Academy's voting membership.
The Academy Award for Best Picture is one of the Academy Awards presented annually since the awards debuted in 1929, by the Academy of Motion Picture Arts and Sciences (AMPAS).
AC/DC are an Australian rock band, formed in 1973 by brothers Malcolm and Angus Young. A hard rock/blues rock band, they have also been considered a heavy metal band, although they have always dubbed their music simply "rock and roll".
An actor (or in some cases actress for females; see terminology) is a person who portrays a character in a performance.
The Achaemenid Empire (/əˈkiːmənɪd/, from Old Persian Haxāmanišiya, c. 550–330 BC), also called the (First) Persian Empire, was an empire based in Western Asia, founded by Cyrus the Great.
Acetic acid /əˈsiːtᵻk/, systematically named ethanoic acid /ˌɛθəˈnoʊᵻk/, is a colourless liquid organic compound with the chemical formula CH3COOH (also written as CH3CO2H or C2H4O2).
Acne, also known as acne vulgaris, is a long-term skin disease that occurs when hair follicles are clogged with dead skin cells and oil from the skin.
Acupuncture is a form of alternative medicine in which thin needles are inserted into the body. It is a key component of traditional Chinese medicine (TCM).
An acronym is a word or name formed as an abbreviation from the initial components in a phrase or a word, usually individual letters (as in NATO or laser) and sometimes syllables (as in Benelux).