AC

Initialism of absolute ceiling.

Initialism of access control.

Initialism of account current.

Initialism of anterior chamber.

Initialism of adult contemporary (a radio format).

Initialism of adenylyl cyclase.

Initialism of adjuvant chemotherapy.

Initialism of air conditioning.

Initialism of air corps.

Initialism of aircraftman.

Initialism of alternating current (often used to indicate an alternating potential rather than a current).

Initialism of alternating current (often used to indicate an alternating potential rather than a current).

supply of electric energy via a public electricity grid

Initialism of area code.

Initialism of army corps.

Initialism of athletic club.

Initialism of author's correction.

Initialism of automobile club.

Initialism of Auxiliary Collier (a naval coal transport that travels with the fleet to provide coal for coal-powered warships).

Initialism of axiom of choice.

Initialism of assistant commissioner, a police rank used in London's Metropolitan Police.

Companion of the Order of Australia.

Initialism of aviation cadet.

Initialism of ammonium chloride.

Initialism of autonomous county.

Initialism of armor class.

singular of ACs (“autistics and cousins”).

Initialism of administrative custody.

Anglo-Catholic.

Initialism of acromioclavicular.

Initialism of air conditioned.

Initialism of antichristian.

Initialism of anno Christi (in the year of Christ).

Initialism of ante Christum, (before Christ).

Initialism of all clear (as in button on electronic calculator).

Initialism of ante cibum (before meals).

Initialism of as charged, as in: guilty as charged, usually a/c.

Abbreviation of Aceh: a province of Indonesia.

Abbreviation of Acre: a state of Brazil.

Initialism of America's Cup (competition yacht sailing match racing regatta).

Initialism of Appeal Cases (a subseries of Incorporated Council of Law Reporting's Law Reports).