What does AD stand for?

What does AD mean?

AD	Agility Dog Miscellaneous » Dogs Related
AD	Active Directory Computing » Drivers
AD	Admissions Community » Educational
AD	Andrew Darnall Community » Famous
AD	Assistant Director Governmental » FBI Files
AD	Action Due Governmental » FDA
AD	AfterDark Screensaver Computing » File Extensions
AD	Authorized Dealer Business » Firms
AD	Air Dried Miscellaneous » Food
AD	After Dinner Miscellaneous » Food
AD	Anti-Dumb Miscellaneous » Funnies
AD	Athletic Dictator Miscellaneous » Funnies
AD	Aggregate Demand Business » General
AD	Additional Delivery Business » General
AD	Accumulation Distribution Business » General
AD	Auto Date Business » General
AD	Advertisement Business » General
AD	Analog to Digital Computing » General
AD	Außer Dienst International » German
AD	After the Downfall Governmental
AD	Acción Democrática International » Guatemalan
AD	Analog Disc Computing » Hardware
AD	Admission and Discharge Medical » Hospitals
AD	As Directed Medical » Hospitals
AD	Amoebic Dysentery Medical » Hospitals