Browse the Concise Encyclopedia
- afghan wars
- afl-cio
- aflatoxin
- africa
- african arts
- african languages
- african lily
- african methodist episcopal church (ame church)
- african national congress (anc)
- african religions
- african union (au)
- african violet
- afrikaans language
- afrikaner
- afro-asiatic languages
- afro-caribbean, afro-brazilian, and afro-american religions
- afrocentrism
- afterburner
- afterpiece
- aga khan
- agadir
- agamemnon
- agape
- agaric
- agate
- agate fossil beds national monument
- agatha, saint
- agave family
- age set
- agenais
- agence france-presse (afp)
- agency
- agenesis
- agent orange
- ageratum
- agglomerate
- aggressive behaviour
- aghlabid dynasty
- agiads
- agincourt, battle of
- aging
- agĂou orous, gulf of
- agitprop
- agnes, saint
- agni
- agnosticism
- agora
- agoracritus
- agouti
- agribusiness
- agricultural adjustment administration (aaa)
- agricultural revolution
- agriculture
- agrimony
- agrochemical
- agronomy
- aguascalientes
- ahab
- ahaggar
- ahimsa
- ahmadiyyah
- ahura mazda
- aide-de-camp
- aids
- aikido
- ailanthus
- ainu
- air
- air brake
- air force
- air france
- air mass
- air pollution
- air warfare
- air-conditioning
- air-cushion vehicle
- airbrush
- airbus s.a.s.
- aircraft carrier
- airedale terrier
- airfoil
- airplane
- airport
- airship
- aix-la-chapelle, congress of
- aix-la-chapelle, treaty of
- ajax
- ak -47
- akal takht
- akali party
- akan
- akhenaton
- akita
- akkad
- akkadian language
- aksum
- akwamu
- al
- al-
- al-qadisiyyah, battle of