The many meanings of AC

Atlantic City
Alternating Current

 
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Darn, you guys took all of the good ones...

AC Adult Contemporary (radio format)
AC Air Conditioning/Conditioner
AC Alternating Current (electricity; physics)
AC Ante Cibum (Latin: Before Meals)
AC Area Code
AC Author's Correction
AC Aachen (Germany)
AC Abdominal Circumference (measure of fetal growth in pregnancy)
AC Aberdeen College
AC Aberración Cromosómica (Spanish)
AC Absolute Ceiling
AC Absorption Chiller
AC Abstinence Committed
AC Academia Cotopaxi (Quito, Ecuador)
AC Academic Complex
AC Academic Institution (DNS zone for UK academic institutions; as in .ac.uk)
AC Accept (ITU-T)
AC Acceptance Criteria
AC Access Card
AC Access Channel
AC Access Concentrators
AC Access Control
AC Access Customer
AC Acción Ciudadana (Spanish: citizen action; Guatemala)
AC Account
AC Account Code (Sprint BCS-29)
AC Account Control
AC Account Current
AC Accountability Measurement
AC Accountancy
AC Ace Combat (video games 1-5)
Ac Acetyl Group (chemistry)
AC Acid Ceramidase
AC Acknowledged Connectionless
AC Acoustic Coupler
AC Acquisition Category
AC Acquisition Center
AC Acre (state of Brazil)
AC Acromioclavicular (shoulder joint)
AC Actinium
AC Action Chit
AC Action Code
AC Action for Change (Mauretania)
AC Activated Charcoal
AC Active Commanding
AC Active Component
AC Active Counter
AC Actual Commitment
AC Actual Cost
AC Actual Count
AC Adapter Card (FS-1037c)
AC Added Copy (libraries)
AC Addictions Counselor (New Life Ministries)
AC Adenylate Cyclase
AC Adjacent Channel
AC Adjudicator
AC Adjustment Center (prisons)
AC Administrative Complex
AC Administrative Control
AC Admirals Club
AC Adoptionscentrum (Sweden)
AC Adriamycin and Cytoxan (chemotherapy protocol)
AC Advance Construction
AC Advanced Challenge (activity, Camp Yawgoog, BSA)
AC Advanced CMos
AC Advanced Computing
AC Advent Children (movie sequel to Final Fantasy VII game)
AC Advent Christian
AC Advisory Circular (aviation)
AC Advisory Committee
AC Advocacy Center
AC Aelod Cynulliad (Welsh: Member of the National Assembly for Wales)
AC Aero Club
AC Affirmative Constructive (debate)
AC After Catch Yards (yards gained after catching a pass, football)
AC After Christ
AC After Colony
AC After Colony (Gundam Wing animated series)
AC After Coupon
AC Age Concern (UK)
AC Agent Code
AC Agent Cost (Sprint)
AC Agir Ensemble Contre le Chômage (Paris, France)
AC Agro Centro (Guatemala)
AC Aiming Circle (field artillery aiming instrument)
AC Air Cadets
AC Air Canada (airline code)
AC Air Cargo
AC Air Carrier
AC Air Change
AC Air Commodore
AC Air Compressor
AC Air Conduction
AC Air Controller
AC Air Controlman
AC Air Coordinator
AC Air Corps
AC Air Curtain
AC Air Traffic Controller (USN Rating)
AC Air-Cooled
AC Aircraft
AC Aircraft Carrier
AC Aircraft Commander
AC Aircraftman
AC Airframe Change
AC Airspace Control
AC Akademikernes Centralorganisation
AC Alameda County
AC Alan Cox (Linux kernel hacker)
AC Alcohol Concentration
AC Aleister Crowley (novelist)
AC Alice Cooper (musician)
AC Alicyclic
AC Alignment Check
AC Alimbic Cluster (Metroid Prime Hunters video game)
AC All Clear
AC Allen Cowlings (OJ Simpson trial)
AC Allergic Conjunctivitis
AC Allied Chat (gaming)
AC Allied Command
AC Allis Chalmers (manufacturer of agriculture and industrial equipment)
AC Alpha Centauri (game)
AC Alternate Call (listing)
AC Alternative Certification (teaching0
AC Altocumulus (cloud formation)
AC Ambush At Corellia (Star Wars novel)
AC American Choppers (TV series)
AC American College
AC Amount Claimed
AC Analog Computer
AC Analysis Console
AC Analyst Console
AC Analytical Chemistry
AC Anarchist's Cookbook
AC Ancho Canyon
AC Andersen Consulting
AC Anderson College (South Carolina)
AC Anderson Cooper (news correspondent)
AC Angel Crew (band)
AC Angelina College
AC Anglican Communion
AC Animal Control
AC Animal Crossing (video game)
AC Anno Christi (Latin: In the Year of Christ; epigraphy)
AC Annual Conference (Church of the Brethren)
AC Anonymous Caller
AC Anonymous Coward (Slashdot)
AC Answer Complete
AC Ante Cenam (Latin: Before a Meal)
AC Ante Christum (Latin: Before Christ)
AC Antecubital
AC Antenna Controller
AC Antennal Commissure
AC Anterior Chamber
AC Anthony Calhoun (sports anchorman)
AC Anthony Carter (ex-NFL player)
AC Anthrocon (anthropomorphics convention)
AC Anti Christ
AC Antigua
AC Apelação Cível (Civil Appeal; Brazil)
AC Aperture Card Sil Negative
AC Appeal Cases
AC Appeals Council (Social Security)
AC Appellation Contrôlée (beverages)
AC Apple Cider
AC Apple Computer
AC Application Context
AC Application Control Architecture
AC Applied Cryptography (book)
AC Arc Consistency (constraint programming AI research)
AC Arc Cutting
AC Area Commander
AC Area Commissioner (UK scouting)
AC Area Coordinator
AC Area Correlator
AC Area of Concern (school grading system)
AC Arithmetic Coding
AC Arm Chair
AC Armament Computer
AC Armor Class
AC Armored Core (video game)
AC Armoured Core (game)
AC Army Component
AC Army Corps
AC ARTS Controller
AC Aryan Circle (gang)
AC Asbestos Cement
AC Asbury College (Kentucky, USA)
AC Ascension Island (top level domain)
AC Ascension Islands (ISO country code)
AC Ash Catchem (Pokémon protagonist)
AC Ashbury College (Canada)
AC Asheron's Call (game)
AC Asphalt Concrete
AC Asphalt Content
AC Assessment Counselor (New Life Ministries)
AC Assigned Capital
AC Assist Control (ventilation)
AC Assistant Camera (film production)
AC Assistant Chef
AC Assistant Coach
AC Assistant Commissioner
AC Associate Commissioner
AC Associate Contractor
AC Association Class
AC Association Control
AC Associativity and Commutativity (math)
AC Associazione Calcio (Italian: soccer club)
AC Associazione Calcistica (Italian: Soccer Association)
AC Assumption Iloilo
AC Astrographic Catalogue
AC Asynchronous Communications
AC Atheist Crew
AC Athletic Club
AC Atlantic City
AC Atlas Centaur (US intermediate class expendable launch vehicle)
AC Atmospheric Chemistry
AC Atmospheric Corrector
AC Atomic Clock
AC Attack Cargo Plane (military aircraft designation, as in AC-130)
AC Attack Center
AC Attack Console
AC Attenuation Correction
AC Attribute Certificate
AC Audio Codec
AC Augustana College (ELCA college, Sioux Falls, SD)
AC Austin Croshere (NBA player)
AC Australian Capital Territory
AC Authentication Center
AC Authentication Code (telecommunications)
AC Authorised Certified (seed)
AC Autistics and Cousins
AC Auto Carrier (chassis supplier of original Cobra roadster)
AC Auto Clicker (gaming)
AC Auto-Cannon (gaming, Mechwarrior)
AC AutoCAD
AC Autocannon
AC Autocars and Accessories Ltd.
AC Autocheck
AC Automatic Callback (Bellcore)
AC Automatic Computer
AC Automatic Correlation
AC Automation Company
AC Automobile Club
AC Auxiliary Circuit
AC Auxiliary Contact
AC Auxilio Ciudadano (Spanish, special police & military task force)
AC Avanti Cristo (Italian: Before Christ)
AC Aviation Cadet
AC Aviation Challenge
AC Awaiting Connection
AC AWP Control
AC Axiom of Choice (math)
AC Bureau of Arms Control
AC Companion of the Order of Australia
AC DCS/Comptroller
AC Hydrogen Cyanide
aC Ante de Cristo (Spanish: Before Christ)

*looks at the enormous list* O_o

Me thinks somebody has a wee bit too much time on his paws.

Couldn't help but notice you've skipped the reference to sexual orintation.