AC, A.C. or Ac may refer to:
The Academy Award for Best Picture is one of the Academy Awards presented annually by the Academy of Motion Picture Arts and Sciences (AMPAS) since the awards debuted in 1929. This award goes to the producers of the film and is the only category in which every member of the Academy is eligible to submit a nomination.
An acronym is a word or name formed as an abbreviation from the initial components of a phrase or a word, usually individual letters (as in NATO or laser) and sometimes syllables (as in Benelux).
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).
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.
An actor is a person who portrays a character in a performance (also actress; see below). The actor performs "in the flesh" in the traditional medium of the theatre or in modern media such as film, radio, and television.