• History of abasia
• History of abdominohysterotomy
• History of abolitionism
• History of absolutism
• History of advocateship
• History of aerophotogrammetry
• History of aerostation
• History of anamorphosis
• History of anarchism
• History of angelology
• History of anti-semitism
• History of antisemitism
• History of arteriology
• History of associationism
• History of astrognosy
• History of astromancy
• History of astrometeorology
• History of autoaggression
• History of autoerotism
• History of autohemotherapy