AAAA

AAAA may refer to:

Internet and computing

 * AAAA protocol, within computer security, "authentication, authorization, accounting and auditing" – the AAA protocol combined with auditing
 * AAAA record, also known as "IPv6 address record", maps a hostname to a 128-bit IPv6 address in the Domain Name System (DNS)
 * Internet Authentication Service, as an acronym for the four main services provided: Authentication, Authorization, Accounting, and Auditing

Organizations

 * Aboriginal Art Association of Australia, a peak body for Aboriginal art in Australia
 * American Association for the Advancement of Atheism, an atheistic and antireligious organization
 * American Association of Advertising Agencies, a U.S. trade association for advertising agencies
 * Anguilla Amateur Athletic Association, former name of the Anguilla Amateur Athletic Federation, governing body for athletics in Anguilla
 * Asociación Argentina Amigos de la Astronomía, an amateur astronomy civil association
 * Associated Actors and Artistes of America, an association of the performer trade unions Actors' Equity, AFTRA, Agma, and Agva
 * Australian Automotive Aftermarket Association, an automotive industry association for automotive aftermarket parts

Other uses

 * AAAA battery, a 1.5 volt battery, smaller than the AAA size
 * AaAa, possible reading of the name Aa, an ancient Egyptian architect
 * AAAA, a rhyme scheme